Development tools 19,246 crates

fluent_resultFluent postfix helpers for Rust's Result and Option types831MIT OR Apache-2.0Data structuresDevelopment tools elastic-mappingGenerate Elasticsearch mapping definitions from Rust structs and enums using derive macros831MITDatabase interfacesDevelopment tools mi6-coreCore types and traits for mi6831MIT OR Apache-2.0Command line utilitiesDevelopment tools abundantisHigh-performance unified environment variable management from multiple sources831MITConfigurationDevelopment tools egui_layout_job_macroMacros for egui LayoutJob and TextFormat831LGPL-3.0-onlyDevelopment toolsGame development depyler-analysisAnalysis, type inference, and optimization passes for the Depyler transpiler830MIT OR Apache-2.0CompilersDevelopment tools higher-graphen-coreShared primitive types and contracts for HigherGraphen.829Apache-2.0Command line utilitiesData structures openapi-sdkA fully-featured and blazing-fast Rust API client to interact with Openapi®828MITAPI bindingsAsynchronous pathmod_coreCore runtime for pathmod accessors827MIT OR Apache-2.0Data structuresDevelopment tools patternhuntA high-performance, cross-platform glob/pattern matching library for filesystem search with advanced pattern support and metadata…827MIT OR Apache-2.0AlgorithmsAsynchronous micro-tssA simple implementation of a Tatsu Signing Server.827MIT OR Apache-2.0Command line utilitiesDevelopment tools holger-ronHolger guards your artifacts at rest. May Allfather Odin watch over every bit.827MITCommand line utilitiesDevelopment tools traverse-cliCommand-line tools for Solidity code analysis, visualization, and test generation827MIT OR Apache-2.0Command line utilitiesDevelopment tools theater-chainAppend-only hash chain for Theater actor event history827Apache-2.0ConcurrencyDevelopment tools fixture_deriveFixture derive macro for Type Driven Development826MIT OR Apache-2.0Development toolsDevelopment tools::Procedural macro helpers depyler-toolingIDE, debugging, documentation, and tooling support for the Depyler transpiler826MIT OR Apache-2.0CompilersDevelopment tools albert-runtimeConversation runtime for Albert CLI — session management, MCP, OAuth, bash execution, tool use and compaction826LGPL-2.1-or-laterCommand line utilitiesDevelopment tools xchecker-runnerProcess execution with timeouts and job control826MIT OR Apache-2.0Command line utilitiesDevelopment tools xchecker-lockFile locking for concurrent xchecker executions826MIT OR Apache-2.0Command line utilitiesDevelopment tools embacle-mcpMCP server for embacle LLM runners — expose AI CLI tools via Model Context Protocol826Apache-2.0Command line utilitiesDevelopment tools sniptSnipt - A clipboard manager and automation tool825MITCommand line utilitiesDevelopment tools depyler-lambdaAWS Lambda transpilation support for the Depyler Python-to-Rust transpiler825MIT OR Apache-2.0CompilersDevelopment tools json_preprocessorJSON PreProcessor825MIT OR Apache-2.0Command line utilitiesDevelopment tools rex-cliCLI for Rust project harness management825MITCommand line utilitiesDevelopment tools mcp-execution-coreCore types, traits, and error handling for MCP execution825MIT OR Apache-2.0Development tools tuplities-partial-eqA trait for partial equality comparison of tuples824non-standardData structuresDevelopment tools xchecker-redactionSecret detection and redaction for xchecker824MIT OR Apache-2.0Command line utilitiesDevelopment tools tonin-buildbuild.rs helper for tonin services. Wraps tonic-prost-build with tonin conventions.824Apache-2.0Development toolsNetwork programming trampoline-parserDSL for generating trampoline-based scannerless parsers823MITDevelopment toolsParser implementations mcplease-cliCLI tool for creating MCP servers with mcplease822MIT OR Apache-2.0Command line utilitiesDevelopment tools specsyncBidirectional spec-to-code validation with schema column checking — 33 languages, single binary822MITCommand line utilitiesDevelopment tools open-kioku-storageStorage traits and index abstractions for Open Kioku.822Elastic-2.0Development tools submodA headache-free submodule management tool, built on top of gitoxide. Manage sparse checkouts, submodule updates, and…821non-standardCommand line utilitiesDevelopment tools decy-repoGitHub repository transpilation with parallel processing821MIT OR Apache-2.0Command line utilitiesCompilers polaris_agentAgent trait for defining reusable behavior patterns in Polaris.821Apache-2.0AsynchronousDevelopment tools qubit-commonFoundational utilities and language-level tools for Rust application development820Apache-2.0Development toolsRust patterns dumpfsA tool for dumping codebase information for LLMs efficiently and effectively820MITCommand line utilitiesDevelopment tools mevcatLightweight tool for interacting with MEV APIs820MITCryptography::CryptocurrenciesDevelopment tools decy-bookBook-based verification for transpiled Rust code819MIT OR Apache-2.0Command line utilitiesCompilers decy-mcpMCP server for Claude Code integration819MIT OR Apache-2.0Command line utilitiesCompilers camel-component-kafkaKafka component for rust-camel integration framework819Apache-2.0AsynchronousDevelopment tools cargo-image-runnerA generic, customizable runner for building and booting kernel/embedded images with Limine, GRUB, QEMU, and more818MITCommand line utilitiesDevelopment tools nucel-agent-claude-codeClaude Code provider for Nucel agent-sdk — subprocess wrapper for claude CLI818Apache-2.0API bindingsDevelopment tools reposix-githubGitHub Issues BackendConnector implementation for reposix.818MIT OR Apache-2.0API bindingsDevelopment tools anodizer-stage-pkgmacOS pkg installer stage for anodizer release automation817MIT OR Apache-2.0Development toolsDevelopment tools::Build Utils capsula-cliThe command line interface for Capsula.817MIT OR Apache-2.0Command line utilitiesDevelopment tools path_normalizerLexically normalize paths in Rust without touching the filesystem.817MITDevelopment toolsFilesystem burncloud-database-coreCore database abstractions and traits for BurnCloud AI management system816MIT OR Apache-2.0API bindingsDatabase interfaces shirabe-utilsUtilities for the Shirabe Framework816MITDevelopment tools cargo-checA cargo subcommand to run cargo check and output filtered error messages as a JSON array816MIT OR Apache-2.0Command line utilitiesDevelopment tools sr-aiAI backends, caching, and AI-powered git commands for sr816Apache-2.0Development tools libpgfmtA Rust library for formatting PostgreSQL SQL and PL/pgSQL816BSD-3-ClauseDevelopment toolsText processing cratestack-client-rustRust-native schema-first framework for typed HTTP APIs, generated clients, and backend services.816MITDevelopment toolsWeb programming semioscanProduction-grade Rust library for blockchain analytics: gas calculation, price extraction, and block window calculations for EVM…815Apache-2.0Cryptography::CryptocurrenciesDevelopment tools reposix-confluenceConfluence Cloud BackendConnector implementation for reposix.815MIT OR Apache-2.0API bindingsDevelopment tools lang-typesA Language enum for programming language identification and file extension mapping.815MITDevelopment toolsParsing tools api_claudeClaude API for accessing Anthropic's large language models (LLMs).815MITAlgorithmsDevelopment tools clawft-pluginPlugin trait definitions for clawft815MIT OR Apache-2.0Development tools worktree-ioA CLI tool to open GitHub issues as git worktree workspaces815MITCommand line utilitiesDevelopment tools rod_validationA lightweight and ergonomic validation library for Rust814GPL-3.0Development toolsParsing tools membaseUltra-high performance async runtime with fast task cycling, lock-free scheduling, and zero-overhead performance814Apache-2.0AsynchronousConcurrency dprint-configStrongly-typed configuration structs and JSON Schema for dprint formatter plugins (TypeScript, JSON, TOML, Markdown). Used by…814Apache-2.0Development toolsNo standard library ez-stackA CLI tool for managing stacked PRs with GitHub814MITCommand line utilitiesDevelopment tools sgr-agentSGR LLM client + agent framework — structured output, function calling, agent loop, 3 agent variants813MITDevelopment tools runar_macrosProcedural macros for the Runar Node system813MITDevelopment tools incodeInCode - MCP server for LLDB debugging automation813MITDevelopment tools reposix-jiraJIRA Cloud BackendConnector implementation for reposix.812MIT OR Apache-2.0API bindingsDevelopment tools mdbook-include-rsAn mdBook preprocessor that includes external Rust source files812MIT OR Apache-2.0Command line utilitiesDevelopment tools perspt-coreCore types and LLM provider abstraction for Perspt812LGPL-3.0Command line utilitiesDevelopment tools hx-configConfiguration parsing and project detection for hx811MITCommand line utilitiesDevelopment tools opentrustprotocol🦀 Official Rust SDK for OpenTrust Protocol - The mathematical embodiment of trust itself. Features neutrosophic judgments, fusion…810MITAlgorithmsCryptography::Cryptocurrencies lazyceleryA terminal UI for monitoring and managing Celery workers and tasks, inspired by lazydocker/lazygit810MITCommand line utilitiesDevelopment tools resonate-sdkResonate SDK for Rust809Apache-2.0AsynchronousDevelopment tools claude-managerA terminal UI for managing multiple Claude Code sessions organized by projects and tasks808MITCommand line utilitiesDevelopment tools alintLanguage-agnostic linter for repository structure, file existence, filename conventions, and file content rules.808Apache-2.0 OR MITCommand line utilitiesDevelopment tools guidebookHonKit/GitBook compatible static book generator807MITCommand line utilitiesDevelopment tools ocommitquickly create a git commit message with ollama and commit, locally807MITDevelopment tools iec61131IEC 61131-3 Structured Text (ST) parser with static analysis807MITDevelopment toolsParsing tools soppoCompiler for Soppo, a Go superset with enums, pattern matching, and nil safety806BSD-3-ClauseCompilersDevelopment tools cratestack-codec-jsonRust-native schema-first framework for typed HTTP APIs, generated clients, and backend services.806MITDevelopment toolsWeb programming ironicA batteries-included, type-safe application framework for Rust806MIT OR Apache-2.0Development toolsWeb programming::HTTP server reposix-cacheOn-disk bare-repo cache built from REST responses; lazy blob materialization for git partial-clone.805MIT OR Apache-2.0CachingDevelopment tools kodegen_native_notifyKODEGEN.ᴀɪ: Memory-efficient, Blazing-Fast, MCP tools for code generation agents.805Apache-2.0 OR MITAPI bindingsCommand line utilities lenso-platform-httpHTTP primitives for the Lenso backend framework.805MITDevelopment toolsWeb programming starweaver-toolsFunction tools, tool registries, and execution primitives for Starweaver805BSD-3-ClauseDevelopment tools acliRust SDK for the ACLI (Agent-friendly CLI) specification804EUPL-1.2Command-line interfaceDevelopment tools buildfix-receiptsTolerant receipt loader for artifacts/*/report.json inputs804MIT OR Apache-2.0Development tools lintel-validateCore validation engine for Lintel — validates JSON, YAML, TOML, JSON5, and JSONC against JSON Schema804Apache-2.0Development tools oteliteOtelite: OTLP receiver, dashboard, and CLI for local OpenTelemetry observability804Apache-2.0Command line utilitiesDevelopment tools bmux_attach_image_protocolNeutral attach image transport DTOs shared by bmux runtime crates803MPL-2.0Development tools adv_fs_utilsA comprehensive library for file system operations with progress reporting and advanced search capabilities803MITCommand line utilitiesDevelopment tools brush-ocap-coreReusable core of a POSIX/bash shell (used by brush-shell)803MITCommand line utilitiesDevelopment tools lenso-platform-moduleModule behavior seams for the Lenso backend framework.803MITDevelopment toolsWeb programming cargo-flLightning-fast Rust linter for pre-compilation checks802MIT OR Apache-2.0Development tools mermaid-cliOpen-source AI pair programmer with agentic capabilities. Local-first with Ollama, native tool calling, and beautiful TUI.802MIT OR Apache-2.0Command line utilitiesDevelopment tools strl1-xtaskopsGoodies for working with the xtask concept802MIT OR Apache-2.0Development tools rgen-utilsShared utilities for rgen802MITCommand line utilitiesDevelopment tools cargo-docs-mdGenerate per-module markdown documentation from rustdoc JSON output801MITCommand line utilitiesDevelopment tools tideway-cliCLI for scaffolding Tideway SaaS applications - backend modules, frontend components, and more801MIT OR Apache-2.0Command line utilitiesDevelopment tools atelier_resultsStandardized results, errors and successes for the atelier-rs engine800Apache-2.0Data structuresDevelopment tools abi2humanZero-dependency CLI tool to convert Ethereum ABI JSON to human-readable format800MIT OR Apache-2.0Command line utilitiesCryptography::Cryptocurrencies zerodds-idlOMG IDL 4.2 (ISO/IEC 19516) parser + AST + semantic model for ZeroDDS — lexer, grammar engine, CST→AST builder, spec validators,…800Apache-2.0Development toolsParsing tools gfrA blazingly-fast, Rust tool for finding patterns in code, inspired by 'gf'.799MITCommand line utilitiesDevelopment tools daemon-baseA flexible and configurable Rust daemon library with lifecycle management, logging, callbacks, and optional async support. Works…799Apache-2.0AsynchronousConfiguration scribe-webserviceWeb service interface for Scribe repository analysis799MIT OR Apache-2.0Development toolsParsing tools test-numbat-codec-deriveMacro implementations of test-numbat-codec #[derive(NestedEncode, NestedDecode, TopEncode, TopDecode)]799GPL-3.0-onlyCryptography::CryptocurrenciesDevelopment tools test-denaliParser/writer of the test-denali test format799GPL-3.0-onlyCryptography::CryptocurrenciesDevelopment tools vox-jitCranelift JIT backend for vox: compiled decode/encode stubs replacing the reflective interpreter799MIT OR Apache-2.0Development tools libpybuildPython src+dependency bundler library798Apache-2.0Command line utilitiesDevelopment tools xchecker-utilsFoundation utilities for xchecker798MIT OR Apache-2.0Command line utilitiesDevelopment tools kotoba-replKotoba REPL - Interactive shell for Kotoba programming language797Apache-2.0Command line utilitiesDevelopment tools dekDeclarative environment setup and scripted workflows from TOML797MITCommand line utilitiesDevelopment tools autovariants-deriveA macro that exposes a function that returns all enum variants.796non-standardDevelopment toolsRust patterns anda_brain🧠 Anda Brain (大脑) — Autonomous Graph Memory for AI Agents796Apache-2.0AccessibilityDevelopment tools thirtyfour-stealthA stealthy, undetected implementation of thirtyfour for web automation795MITAPI bindingsDevelopment tools bestbeforeA procedural macro for marking code with expiration dates795EPL-2.0Development toolsRust patterns shrA cli to generate System Health Rating score for a system repo!795MITCommand line utilitiesDevelopment tools claude_assets_coreLayer 1 domain logic: symlink-based Claude Code artifact installer795MITDevelopment toolsFilesystem taudit-parse-gitlabParses GitLab CI YAML into taudit typed authority graphs for CI/CD propagation and trust-boundary analysis.794MIT OR Apache-2.0Development toolsDevelopment tools::Testing git_sshripped_repositoryRepository domain for git-sshripped794MPL-2.0Command line utilitiesDevelopment tools tokmd-contentContent scanning helpers for tokmd analysis (TODOs, duplicates, imports).794MIT OR Apache-2.0Development tools sloc-gitGit CLI wrappers, HMAC webhook verification, and scan-schedule store for oxide-sloc794AGPL-3.0-or-laterCommand line utilitiesDevelopment tools purgerA tool for cleaning Rust project build directories793MIT OR Apache-2.0Command line utilitiesDevelopment tools polixAST Based Language Tool792MITCommand line utilitiesDevelopment tools vtcode-uiUnified UI crate for VT Code: design system, theme registry, and TUI framework792MIT OR Apache-2.0Command line utilitiesDevelopment tools auto-defaultMacro that adds a default field value of `Default::default()` to fields that don't have one792MIT OR Apache-2.0Development toolsDevelopment tools::Procedural macro helpers automodel-cliCommand-line interface for AutoModel — SQL-first Reverse ORM for Rust, Built for the greater DX and for the AI Era792MITCommand line utilitiesDatabase interfaces runmatHigh-performance MATLAB/Octave syntax mathematical runtime791MITDevelopment toolsScience holgerHolger guards your artifacts at rest. May Allfather Odin watch over every bit.791MITCommand line utilitiesDevelopment tools nidus-coreCore Nidus dependency injection, modules, provider lifetimes, and application lifecycle.791MIT OR Apache-2.0AsynchronousDevelopment tools kit-cliCLI for scaffolding Kit web applications790MITCommand line utilitiesDevelopment tools git_sshripped_worktreeWorktree domain for git-sshripped790MPL-2.0Command line utilitiesDevelopment tools liberrA flexible error message handling crate focused on error tracing for useful debugging790MITDevelopment toolsDevelopment tools::Debugging blueprint-starlark-syntaxStarlark language AST with extended syntax support790MIT OR Apache-2.0Development toolsParser implementations pforge-cliZero-boilerplate MCP server framework with EXTREME TDD methodology790MITCommand line utilitiesDevelopment tools meerkat-mob-adaptiveCompatibility re-export for Meerkat Mob adaptive internals789MIT OR Apache-2.0API bindingsDevelopment tools perl-subprocess-runtimeShared subprocess execution abstraction with OS and mock runtimes788MIT OR Apache-2.0Development tools git_sshripped_filterGit filter domain for git-sshripped788MPL-2.0Command line utilitiesDevelopment tools llm-sentinel-coreCore types, error handling, and configuration for LLM-Sentinel anomaly detection system788Apache-2.0Development toolsWeb programming skillfile-sourcesSource fetching and caching for skillfile: resolver, strategies, sync788Apache-2.0Command line utilitiesDevelopment tools rustbolt_resolverESM / CJS module resolution787MITDevelopment tools pforge-macroZero-boilerplate MCP server framework with EXTREME TDD methodology787MITCommand line utilitiesDevelopment tools orchestrator-configConfiguration models and loading for the Agent Orchestrator787MITConfigurationDevelopment tools thread-ast-engineCore AST engine for Thread - parsing, matching, and transforming code using AST patterns. Forked from ast-grep-core.786AGPL-3.0-or-later AND MITArtificial intelligenceCommand line utilities mofa-kernelMoFA Kernel - Core runtime and microkernel implementation786Apache-2.0AsynchronousDevelopment tools aaai-guiGUI for aaai — audit for asset integrity785Apache-2.0Development toolsVisualization cargo-extract-testA Cargo subcommand to extract and run a single test function in isolation.785MITDevelopment tools replay-rsA Rust library for recording and replaying terminal sessions with timing data785MITCommand line utilitiesDevelopment tools dampen-coreCore parser, IR, and traits for Dampen UI framework785MIT OR Apache-2.0Development toolsGUI doless_coreA Rust macro to simplify struct mapping and function utilities.784MIT OR Apache-2.0Development toolsRust patterns hex_analyserAnalyzes a hex value and shows its possible meanings784MITCommand line utilitiesDevelopment tools logpileA fast CLI tool to search logs by regex, bucket matches by time, and visualize patterns with charts784MITCommand line utilitiesDevelopment tools miyabi-agent-integrationsMiyabi Integration Agents - External service integrations (Discord, Potpie, Refresher)783Apache-2.0Development toolsWeb programming test-numbat-codecLightweight binary serializer/deserializer, written especially for Numbat smart contracts783GPL-3.0-onlyCryptography::CryptocurrenciesDevelopment tools include-fs-macrosEmbed folders in your binary783Apache-2.0Development toolsGame engines mcpls-coreCore library for MCP to LSP protocol translation783MIT OR Apache-2.0Development tools miyabi-claudableClaudable API client for Next.js frontend generation782Apache-2.0Development toolsWeb programming::HTTP client layer-tl-parserParser for Telegram's Type Language (.tl) schema files782MIT OR Apache-2.0Development toolsParser implementations devspacedevspace helps you to quickly start all the programs you need to dev using Tmux and other tools.781MIT OR Apache-2.0Command line utilitiesDevelopment tools dog-coreCore traits and utilities for the DogRS ecosystem - a modular Rust framework for building scalable applications780MIT OR Apache-2.0AsynchronousDevelopment tools rlsp-yamlA fast, lightweight YAML language server780MITDevelopment toolsText editors cpg-rsA Rust library for working with Code Property Graphs (CPG)779Apache-2.0Development toolsParsing tools lumos-svm-rsA simple SVM test validator. 🦀778MIT OR Apache-2.0Command line utilitiesDevelopment tools rext-coreCore for Rext, batteries included fullstack Rust framework778MITDevelopment toolsWeb programming git_sshripped_cli_modelsCLI models for git-sshripped778MPL-2.0Command line utilitiesDevelopment tools test-numbat-wasmNumbat WebAssembly smart contract API778GPL-3.0-onlyCryptography::CryptocurrenciesDevelopment tools icedragonLinux cross-compilation suite for building portable software776Apache-2.0Command line utilitiesDevelopment tools ururMulti-repo workspace manager - manage distributed Git repositories with a single config776MITCommand line utilitiesDevelopment tools togglogA compile-time toggle wrapper for the log crate776MIT OR Apache-2.0Development tools coderlibA Rust library for AI-powered code assistance and agentic system776MITAPI bindingsCommand line utilities oxilean-kernelOxiLean kernel - The trusted computing base for type checking776Apache-2.0Development toolsScience ziroCross-platform port management tool - quickly find and kill processes occupying ports775MITCommand line utilitiesDevelopment tools arch-lint-coreCore framework for architecture linting - traits, types, and analyzer775MIT OR Apache-2.0Command line utilitiesDevelopment tools lust-analyzerA WIP implementation of the language server protocol (LSP) for the Lust programming language775non-standardDevelopment toolsDevelopment tools::Debugging termanA programmable native terminal manager775MITCommand line utilitiesDevelopment tools zipcrawlExplore and stream ZIP archives without even extracting them.774MITCommand line utilitiesDevelopment tools spipeSmart pipe macro for chaining function/method calls, with unwrap, map, and and_then support772non-standardData structuresDevelopment tools tawsTerminal UI for AWS - navigate, observe, and manage AWS resources772MITCommand line utilitiesDevelopment tools bmux_perf_telemetryRuntime performance telemetry helpers for bmux772MPL-2.0Development tools apithingA standardized API approach based on content and prop traits772MITAPI bindingsDevelopment tools fx-utilsShared utilities, error types, and common data structures for FX trading platform. Provides foundational types, error handling,…772Apache-2.0Development tools facet-assertPretty assertions for Facet types - no PartialEq required772MIT OR Apache-2.0Development toolsDevelopment tools::Testing whippyunits-proc-macrosProcedural macros for whippyunits unit definitions and declarators772MIT OR Apache-2.0Development toolsNo standard library smart_date_timeA smart date time parser and formatter for rust771MITDevelopment tools kotoba-workflow-coreCore workflow engine for Kotoba - minimal interface without heavy dependencies770Apache-2.0API bindingsDevelopment tools craftCommand-line tool for building, testing, and deploying XRPL smart contracts in WASM770ISCCommand line utilitiesDevelopment tools cargo-aprz-libInternal library for cargo-aprz770MITDevelopment tools omnivore-cliUniversal web scraper and code extractor CLI - crawl websites, analyze repositories, build knowledge graphs769MIT OR Apache-2.0Command line utilitiesDevelopment tools asmachinaMachine W emulator core - 16-bit architecture with full instruction set support768MITDevelopment toolsEmulators tree-sitter-query-formatterFormat Tree-sitter queries767MITDevelopment tools cargo-factorioCargo subcommand to zip and install Factorio mods (correct structure, cross-platform).766MIT OR Apache-2.0Command line utilitiesDevelopment tools harness-rs-tools-fsJail-safe filesystem tools (read_file, write_file, edit_file, list_dir, grep, glob) for harness-rs. Symlink-escape protection.766MIT OR Apache-2.0AsynchronousDevelopment tools compactp_syntaxShared syntax-tree types (SyntaxKind, rowan aliases) for the compactp Compact parser frontend.766MITDevelopment toolsParser implementations scaffold-runA CLI tool for scaffolding Rust projects765MITCommand line utilitiesDevelopment tools tsz-solverTypeScript type solver for the tsz compiler765Apache-2.0CompilersDevelopment tools llm-bridge-coreProtocol transform library for LLM API translation between Anthropic and OpenAI.765Apache-2.0Development tools apm-serverWeb UI and agent dispatcher for APM, a git-native project manager for parallel AI coding agents.765BUSL-1.1Development toolsWeb programming::HTTP server arete-idlIDL parsing and type system for Arete764non-standardDevelopment tools rovo-lspLanguage Server Protocol implementation for Rovo annotation validation and completion764MITDevelopment toolsText editors bmux_plugin_sdkPlugin SDK for bmux — the types and traits plugin authors need764MPL-2.0Development tools