Source: doc.rust-lang.org (std library reference) · crates.io database dump, 2026-07-25 (crates directory)Contact
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All 305,250 crates, alphabetically

Data as of 2026-07-25 (crates.io database dump, timestamp 2026-07-25T02:00:36Z). Source: crates.io · db-dump.tar.gz · methodology & corrections.

polAn interactive Reverse Polish Notation (RPN) calculator95GPL-3.0 pol_exportExporter for Windows Registry Policy Files5,121GPL-3.0 polaSilent Assassin TUI for searching skins, checking values, and finding owners!2,657MITCommand-line interface polakoDefine the Bevy tree with `eml!`, style it using a very-css-like `ess` syntax and relate data data with `bind!` and `connect!`4,023MIT OR Apache-2.0 polarA command-line calculator that can also convert between units.3,396MIT OR Apache-2.0 polar-apiGenerated API types and operations for the Polar API31Apache-2.0API bindingsWeb programming::HTTP client polar-arcticAn app for displaying and storing data from the Polar H102,715Apache-2.0 polar-bear-arc-forge-defiARC Forge DeFi platform - Solana token launch with sniper-bot prevention and deep initial liquidity, powered by Rig (ARC) AI…49MIT OR Apache-2.0Cryptography::Cryptocurrencies polar-bear-biochipBio-chip intelligence framework: multi-sensor EEG+motion fusion + rig-core LLM orchestration + ECDSA-signed data provenance34MIT OR Apache-2.0CryptographyScience polar-bear-hft-cryptoCryptographic signing layer for high-frequency trading: ECDSA/Ed25519 forward-engineering + 7-exchange API authentication71MIT OR Apache-2.0AlgorithmsCryptography polar-bear-rig-hftLLM-driven high-frequency trading platform on Solana - PEV loop, Smart Order Routing, SignerContext keypair isolation, and AVM…70MIT OR Apache-2.0AsynchronousFinance polar-bear-rig-onchainrig-onchain-kit agent: Solana balance query → Jupiter swap (dry-run) → SignerContext isolation. Testnet only.35MIT OR Apache-2.0AsynchronousFinance polar-c-apiComing soon1,718Apache-2.0 polar-corePolar core library for oso, an open source policy engine for authorization that’s embedded in your application906,649Apache-2.0 polar-prostProtobuf bindings to interact with Polar watches2,588MIT polar-rsPolar client library for Rust3,023MITAPI bindingsFinance polar-runtimeHTTP client runtime and webhook utilities for the Polar API60Apache-2.0API bindingsWeb programming::HTTP client polar-sdkPolar SDK for Rust1,839MITAPI bindings polar-shRust SDK for the Polar API21Apache-2.0API bindingsWeb programming::HTTP client polar-wasmComing soon1,674Apache-2.0 polar-wasm-apiComing soon1,676Apache-2.0 polar_codecA Rust implementation of polar codes, a class of error-correcting codes that achieve the capacity of symmetric binary-input…130MIT polarangesRust-first genomic range operations on top of Polars DataFrames22MITData structuresScience polarbearPolar bears' panel for wayland3,959GPL-3.0-only polarisCrate name reserved for distribution of https://github.com/agersant/polaris1,941MIT polaris-aiA unified agent runtime where agent patterns are first-class, composable, and optimizable abstractions.684Apache-2.0AsynchronousDevelopment tools polaris-apiRust API client library for Black Duck Polaris.179MITAPI bindings polaris-cliCommand-line client for Black Duck Polaris workflows.42MIT polaris-configLightweight Rust SDK used as Proxyless Service Governance.2,961MIT OR Apache-2.0AsynchronousConfiguration polaris-coreLightweight Rust SDK used as Proxyless Service Governance.2,993MIT OR Apache-2.0AsynchronousConfiguration polaris-dataRust SDK for the Polaris market data API.133MITAPI bindingsFinance polaris-grpcgrpc-rust integrates with polaris-rust.1,530MIT OR Apache-2.0AsynchronousConfiguration polaris-ratelimitLightweight Rust SDK used as Proxyless Service Governance.2,961MIT OR Apache-2.0AsynchronousConfiguration polaris-registryLightweight Rust SDK used as Proxyless Service Governance.2,979MIT OR Apache-2.0AsynchronousConfiguration polaris-routerLightweight Rust SDK used as Proxyless Service Governance.2,962MIT OR Apache-2.0AsynchronousConfiguration polaris-rsLightweight Rust SDK used as Proxyless Service Governance Solution.2,664MIT OR Apache-2.0AsynchronousConfiguration polaris-rustLightweight Rust SDK used as Proxyless Service Governance Solution.4,824MIT OR Apache-2.0Development toolsNetwork programming polaris-specificationService Governance Specification.48,549MIT OR Apache-2.0AsynchronousConfiguration polaris_agentAgent trait for defining reusable behavior patterns in Polaris.821Apache-2.0AsynchronousDevelopment tools polaris_appShared HTTP server runtime for Polaris products.876Apache-2.0AsynchronousWeb programming::HTTP server polaris_core_pluginsCore infrastructure plugins for Polaris.850Apache-2.0AsynchronousDevelopment tools polaris_dashboardA web dashboard for Polaris.251Apache-2.0VisualizationWeb programming polaris_graphGraph execution primitives for Polaris (Layer 2).1,049Apache-2.0AsynchronousDevelopment tools polaris_internalInternal re-export layer for Polaris (use polaris-ai instead).712Apache-2.0Development tools polaris_macro_utilsShared utilities for Polaris procedural macro crates.1,480Apache-2.0 polaris_model_providersModel provider implementations for Polaris760Apache-2.0AsynchronousWeb programming::HTTP client polaris_modelsModel provider interface and registry for Polaris1,018Apache-2.0AsynchronousDevelopment tools polaris_sessionsSession management and orchestration for Polaris agents.760Apache-2.0AsynchronousDevelopment tools polaris_shellShell command execution for Polaris agents753Apache-2.0Development toolsOperating systems polaris_systemA lightweight ECS-inspired system framework for Polaris.1,296Apache-2.0AsynchronousDevelopment tools polaris_system_macrosMacros for polaris_system crate.1,366Apache-2.0 polaris_toolsTool framework for Polaris agents902Apache-2.0AsynchronousDevelopment tools polaris_zkZK-SNARK Merkle-inclusion prover/verifier for the Polaris Identity Token System (M2-1 / R10-1). Plonky2 + Poseidon.…18Apache-2.0Cryptography polarisdbPolarisDB - an embedded vector database for local AI and RAG workloads159MIT OR Apache-2.0Data structuresDatabase interfaces polarisdb-coreCore library for PolarisDB - an embedded vector database for local AI241MIT OR Apache-2.0Data structuresDatabase interfaces polaritonRust parser for Photon packets1,445GPL-3.0-only polariton_serverServer functionality for the Photon packet system1,223GPL-3.0-only polarityWIP1,256MIT polarizationSimulate the polarization of a laser beam11,060MIT OR Apache-2.0ScienceSimulation polarpowerPower system modeling, simulation and analysis using Polars and Powers1,506BSD-3-Clause polarquantRust implementation for Walsh-Hadamard rotation + polar coordinate quantization for LLM weight and KV cache compression19MIT OR Apache-2.0CompressionScience polarsDataFrame library based on Apache Arrow13,150,560MIT polars-ad-hocUtilities for Polars2,667MIT polars-aiA CLI and a library for interacting with Polars DataFrames using natural language queries and AI.3,844MIT polars-algoAlgorithms built upon Polars primitives73,817MIT polars-arrowMinimal implementation of the Arrow specification forked from arrow213,516,315MIT AND Apache-2.0 polars-arrow-formatUnofficial flatbuffers and tonic code of Apache Arrow spec7,030,735Apache-2.0 polars-asyncAsync runtime and utilities of the Polars project.128,030MIT polars-bufferData buffers for the Polars DataFrame library577,286MIT polars-cliCLI interface for running SQL queries with Polars as backend13,427MIT polars-computePrivate compute kernels for the Polars DataFrame library7,055,193MIT polars-configRuntime configuration for the Polars project.128,938MIT polars-coreCore of the Polars DataFrame library13,466,234MIT polars-dtypeLow-level datatype definitions of the Polars project.1,820,183MIT polars-errorError definitions for the Polars DataFrame library13,451,244MIT polars-exprPhysical expression implementation of the Polars project.5,968,555MIT polars-fastjsonLenient, schema-aware JSON projection for Polars141MITEncodingParser implementations polars-ffiFFI utils for the Polars project.646,081MIT polars-formulaHigh-performance formula parsing and materialization library for Polars DataFrames with R/Formulaic/Patsy style syntax4,507MITData structuresScience polars-fuzzyFuzzy search expressions for Polars17MITText processing polars-helpersA collection of helper functions for the Polars data manipulation library2,782MIT polars-ioIO related logic for the Polars DataFrame library13,205,905MIT polars-jsonJSON related logic for the Polars DataFrame library3,084,349MIT polars-jsonschema-bridgeBidirectional conversion between JSON Schema and Polars DataTypes5,588MITData structuresEncoding polars-lazyLazy query engine for the Polars DataFrame library12,985,147MIT polars-mem-engineIn memory engine of the Polars project.5,727,613MIT polars-mongoConnector to read polars dataframes from mongodb collections2,811MIT polars-oocOut-of-core processing support for Polars104,637MIT polars-opsMore operations on Polars data structures12,956,931MIT polars-parquetApache Parquet I/O operations for Polars6,849,692MIT AND Apache-2.0 polars-parquet-formatSafe Parquet and Thrift reader and writer (sync and async)5,450,118MIT AND Apache-2.0 polars-pipeLazy query engine for the Polars DataFrame library9,822,992MIT polars-planLazy query engine for the Polars DataFrame library12,751,181MIT polars-protobufAutomatic polars-structpath implementations for Protocol Buffer messages58MITData structuresEncoding polars-pythonEnable running Polars workloads in Python14,244MIT polars-qfA quant factor plugin for polars.901Apache-2.0 polars-readlinesA util for fast reading lines of files into Polars1,133BSL-1.0 polars-readstat-rsPure Rust readers for SAS, Stata, and SPSS with Polars and Arrow outputs795MIT polars-redisRedis IO plugin for Polars58MIT OR Apache-2.0Data structuresDatabase interfaces polars-rowRow encodings for the Polars DataFrame library12,767,394MIT polars-row-deriveMacro to help convert an interator of structs into a DataFrame2,521MIT polars-rows-iterLibrary for easy and convenient row iteration of polars dataframes25,141MIT polars-rows-iter-deriveSub crate for polars-rows-iter25,376MIT polars-schemaPrivate crate for schema utilities for the Polars DataFrame library5,678,752MIT polars-serdedeserialize from polars295MIT polars-sqlSQL transpiler for Polars. Converts SQL to Polars logical plans11,557,688MIT polars-sqliteRust sqlite3 traits for polars dataframe9,379MITData structuresDatabase interfaces polars-streamPrivate crate for the streaming execution engine for the Polars DataFrame library5,075,055MIT polars-structpathA library for dynamically accessing nested Rust structures using path notation136MITData structures polars-structpath-deriveDerive macros for polars-structpath215MITDevelopment tools polars-structpath-typesCommon objects for polars-structpath and polars-structpath-derive25MITData structuresNo standard library polars-taPolars Series interface for technical indicators — native Polars integration, aligned with ta-lib33MITAlgorithmsScience polars-ta-classicPure-Rust reimplementation of pandas-ta-classic: 150 technical-analysis indicators + 62 candlestick patterns using Polars 0.4630MITFinanceMathematics polars-ta-corePure algorithm layer for polars-ta: technical indicators as &[f64] functions, no_std compatible87MITAlgorithmsScience polars-testingTesting suite for the Polars DataFrame library18,993MIT polars-timeTime related code for the Polars DataFrame library12,829,677MIT polars-utilsPrivate utils for the Polars DataFrame library13,906,385MIT polars-viewA fast and interactive viewer for CSV, Json and Parquet data.47,221MIT polars_arrow_rvsry99dxRust implementation of Apache Arrow1,907Apache-2.0 polars_bsonProvides a BsonReader similar to Polars' JsonReader to read in a cursor of MongoDB Bson documents from a collection and a find…635MITDatabase interfaces polars_excel_writerA Polars extension to serialize dataframes to Excel xlsx files49,055MIT OR Apache-2.0 polars_gdalRead and write GDAL-compatible geospatial data into Polars and GeoPolars.1,709MIT polarsmongo2Connector to read polars dataframes from mongodb collections with full projection pushdown, including nested fields, and…199MIT polarstegoRust implementation of binary Steganographic Polar Codes150MITScienceSecurity polarsxyplaceholder crate to reserve name18MIT polarway-busGeneric, domain-agnostic event bus with fan-out, filtering, and drain buffers21MITAsynchronousData structures polarway-grpcgRPC server for Polarway Railway-Oriented Data Processing20MITDatabase interfacesNetwork programming polarway-lakehouseDelta Lake storage layer for Polarway — ACID transactions, time-travel, audit logging, and user management21MIT polarway-sourcesNetwork-native data sources (WebSocket, REST, gRPC) for streaming into Arrow RecordBatches19MITDatabase interfacesNetwork programming poldercastPeer to Peer topology management135,930MIT OR Apache-2.0 poleFlat tree data structure, as in branchless (pole) tree.1,518MIT pole-specificationService Governance Specification.662MIT OR Apache-2.0AsynchronousConfiguration polentaA toy language about polynomials over finite-fields2,066MIT polestarDummy package1,558Apache-2.0 polestar-apiA lightweight Rust wrapper for the Polestar vehicle GraphQL API51MIT OR Apache-2.0API bindings polhemus_viperA Rust library for the Polhemus Viper electromagnetic tracking system.93MIT OR Apache-2.0Hardware support poli-pagePoli Page SDK for Rust — render PDFs from HTML templates via the Poli Page API17MIT OR Apache-2.0API bindingsWeb programming polibRead, manipulate and store translation data in GNU gettext PO format.1,641,243MIT policiesExecute stored policies and flows over REST using API keys67MIT policyRust Policy Framework2,551Apache-2.0/MIT policy-bridgePackage to run inference for the Trained RL Policy54Apache-2.0 policy-coreCompile-time policy enforcement and taint tracking framework for Rust59MITAuthenticationDevelopment tools policy-dslTiny policy DSL for the tool-approval gate (R295-F6). Parse and evaluate 'tool:git && subcmd:[push] => deny' rules against a…21MIT OR Apache-2.0 policy-enginePolicy Engine allows to dynamically evaluate and enforce policies easily.1,214AGPL-3.0Development tools policy-rsPolicy library for working with protobuf-defined policy objects1,031Apache-2.0Development tools policyaiPolicyAI provides a mechanism for unstructured, composable policies that transform unstructured text into structured outputs.1,810Apache-2.0 policycheckPublisher policy compliance checker - verifies robots.txt, RSL licenses, Content Signals, and TDM policies56MITCommand line utilitiesWeb programming policyd-rate-limitPostfix rate limiter SMTP policy daemon4,363BSD-3-ClauseEmail polilithDocker image quality tool4,117Apache-2.0Command line utilities polimec-commonCommon types, traits, and impls for Polimec and Projects1,084non-standard polimorphismFunction overloading via a procedural macro5,125MITDevelopment toolsParser implementations polinaNAME RESERVED FOR FUTURE 3D WORLD RENDERER1,527MIT poline-rsRust implementation of the poline.js esoteric palette generator1,175MIT polintMulti-language repo-local static-analysis rules (Go and TypeScript/JavaScript today)2,627MIT polint-macrosProcedural macros for polint rule authoring3,400MIT polipo🐙 Minimal, elegant, fast, async Kraken exchange REST API client | Written in Rust21,919MITAPI bindingsWeb programming::HTTP client polishTest-Driven Development done right47,934MITDevelopment tools::Testing polish_notationMacros for polish notation and reverse polish notation math1,867MIT polished-cssCraft polished CSS in Rust following CSSWG standards. Achieve type-safety, modularity, atomicity, and ergonomic styling for…1,553non-standardGraphicsGUI polished-css-macrosProcedural macros which support the development of a library crate `polished-css`.2,004non-standardGraphicsGUI polished_allocatorsA collection of allocators for the Polished project1,282Zlib polished_elf_loaderModular, safe ELF loader for Polished OS, supporting UEFI and no_std environments.941Zlib polished_filesFile loading and (future) filesystem abstraction for Polished OS, supporting UEFI and no_std environments.1,137Zlib polished_gdtGlobal Descriptor Table (GDT) management for the Polished OS project.916Zlib polished_graphicsA graphics library for the Polished OS project.1,312Zlib polished_interruptsInterrupt handling for the Polished OS project.503Zlib polished_memoryMemory management for the Polished OS project.905Zlib polished_panic_handlerPanic handler for Polished OS, providing custom panic behavior and logging.891Zlib polished_pciLow-level routines for initializing and managing PCI devices on x86 systems.1,384Zlib polished_ps2Low-level routines for initializing and managing the PS/2 controller and keyboard on x86 systems.896Zlib polished_scancodesA library for handling and mapping keyboard scancodes in Rust.1,108Zlib polished_serial_loggingSerial port output and logging utilities for Polished OS.2,237Zlib polished_x86_commandsLow-level x86 instructions and utilities for Polished OS.1,314Zlib polishexprA poorly implementation of a polish reverse expression evaluator4,703MITMathematics politerusqlite × Polars bridge library1,507MITData structuresDatabase interfaces polite-cliCommand-line interface for rusqlite × Polars integration1,294MITCommand line utilitiesData structures polite-programmingA Rust package to entice programmers to make their code more polite7,056MIT politeness-macroIsn't it time to be a bit nicer to rustc?1,611MIT politeness-macro-implIsn't it time to be a bit nicer to rustc? (proc macro)2,319MIT polixAST Based Language Tool792MITCommand line utilitiesDevelopment tools polkDotfile manager and symlinker10,083MITConfigurationDevelopment tools polkaA dot language parser for Rust; based on Parser Expression Grammar (PEG) using the excellent pest crate as the underpinning.3,144MIT polka-rsBytecode schema for the Myriad runtime (Abrase language).228MITCompilersEncoding polka-rustcCompiles Polka bytecode to no-std Rust.52MIT polkadotImplementation of a `https://polkadot.com` node in Rust based on the Substrate framework.33,452GPL-3.0-only polkadot-approval-distributionPolkadot Approval Distribution subsystem for the distribution of assignments and approvals for approval checks on candidates over…183,719GPL-3.0-only polkadot-availability-bitfield-distributionPolkadot Bitfiled Distribution subsystem, which gossips signed availability bitfields used to compactly determine which backed…180,147GPL-3.0-only polkadot-availability-distributionThe Availability Distribution subsystem. Requests the required availability data. Also distributes availability data and chunks…181,145GPL-3.0-only polkadot-availability-recoveryThe Availability Recovery subsystem. Handles requests for recovering the availability data of included candidates.180,085GPL-3.0-only polkadot-ckb-merkle-mountain-rangeA generalized merkle mountain range implementation (polkadot fork)4,053,902MIT polkadot-cliPolkadot Relay-chain Client Node169,976GPL-3.0-only polkadot-clientpolkadot-client is a lib1,225MIT polkadot-collator-protocolPolkadot Collator Protocol subsystem. Allows collators and validators to talk to each other.181,173GPL-3.0-only polkadot-core-primitivesCore Polkadot types used by Relay Chains and parachains.1,088,135GPL-3.0-only polkadot-devPlaceholder for Polkadot Dev CLI967GPL-3.0-only polkadot-dev-cliCLI tool for Polkadot developers bundling linting, formatting, and version management1,605GPL-3.0-only polkadot-dispute-distributionPolkadot Dispute Distribution subsystem, which ensures all concerned validators are aware of a dispute and have the relevant…182,667GPL-3.0-only polkadot-duPDU - Polkadot runtime storage analyzer3,741GPL-3.0 polkadot-erasure-codingErasure coding used for Polkadot's availability system188,193GPL-3.0-only polkadot-gossip-supportPolkadot Gossip Support subsystem. Responsible for keeping track of session changes and issuing a connection request to the…181,233GPL-3.0-only