All 305,250 crates, alphabetically

use-change-eventChange-event and stream-event primitives for RustUse82MIT OR Apache-2.0Data structuresDatabase interfaces use-checkComposable pass-fail check primitives for RustUse167MIT OR Apache-2.0Data structuresRust patterns use-chemical-constantsReusable chemical and thermodynamic constants for RustUse124MIT OR Apache-2.0 use-chemical-formulaChemical formula primitives and lightweight parsing for RustUse151MIT OR Apache-2.0Parser implementationsScience use-chemistryComposable chemistry primitives for RustUse.96MIT OR Apache-2.0Data structuresScience use-chordChord metadata primitives for RustUse.85MIT OR Apache-2.0Data structuresNo standard library::No dynamic allocation use-cidrCIDR parsing and prefix validation helpers for RustUse.70MIT OR Apache-2.0 use-circleSmall circle primitives for RustUse geometry148MIT OR Apache-2.0MathematicsScience use-circuitPrimitive circuit relationship vocabulary for RustUse electronics crates112MIT OR Apache-2.0Data structures use-cliFacade crate for RustUse CLI-adjacent primitives85MIT OR Apache-2.0Command-line interfaceRust patterns use-cloudPrimitive cloud vocabulary for RustUse110MIT OR Apache-2.0Data structuresScience use-collatzUtility-first Collatz trajectory helpers for RustUse114MIT OR Apache-2.0AlgorithmsMathematics use-collisionOne-dimensional collision helpers for RustUse110MIT OR Apache-2.0MathematicsScience use-colorComposable primitive color utilities for Rust.90MIT OR Apache-2.0Graphics use-combinatoricsUtility-first checked combinatorics helpers for RustUse245MIT OR Apache-2.0AlgorithmsMathematics use-command-nameCommand and executable name primitives for RustUse CLI-adjacent code109MIT OR Apache-2.0Command-line interfaceRust patterns use-communityPrimitive ecological community vocabulary for RustUse112MIT OR Apache-2.0Data structuresScience use-complexComposable complex-number primitives for RustUse.255MIT OR Apache-2.0MathematicsScience use-componentPrimitive electronic component identity and classification for RustUse152MIT OR Apache-2.0Data structures use-composer-jsonComposer JSON metadata primitives for RustUse.81MIT OR Apache-2.0Data structuresDevelopment tools use-compoundChemical compound identity primitives for RustUse21MIT OR Apache-2.0Data structuresScience use-compressionCompression level, intent, and codec label primitives for RustUse80MIT OR Apache-2.0CompressionDevelopment tools use-computing-constantsReusable computing constants for RustUse119MIT OR Apache-2.0 use-conductivityPrimitive thermal and electrical conductivity helpers110MIT OR Apache-2.0AlgorithmsScience use-configFacade crate for primitive RustUse configuration vocabulary81MIT OR Apache-2.0ConfigurationData structures use-config-keyPrimitive configuration keys, dotted paths, and sections for RustUse135MIT OR Apache-2.0ConfigurationData structures use-config-layerPrimitive shallow configuration map layering and merging for RustUse105MIT OR Apache-2.0ConfigurationData structures use-config-profilePrimitive runtime and deployment profile names for RustUse106MIT OR Apache-2.0ConfigurationData structures use-config-secretPrimitive secret references and redacted values for RustUse configuration helpers105MIT OR Apache-2.0ConfigurationData structures use-config-sourcePrimitive configuration source identity and precedence metadata for RustUse136MIT OR Apache-2.0ConfigurationData structures use-config-valuePrimitive deterministic configuration value representation for RustUse135MIT OR Apache-2.0ConfigurationData structures use-configurationGeometric configuration primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-congruenceCongruence helpers for RustUse geometry118MIT OR Apache-2.0MathematicsScience use-conicConic primitives for the RustUse geometry workspace118MIT OR Apache-2.0MathematicsScience use-conservation-statusPrimitive conservation status vocabulary for RustUse104MIT OR Apache-2.0Data structuresScience use-consistencyConsistency and durability label primitives for RustUse80MIT OR Apache-2.0Data structuresDatabase interfaces use-constantsUmbrella crate for the RustUse constants workspace92MIT OR Apache-2.0 use-constellationPrimitive constellation vocabulary for RustUse104MIT OR Apache-2.0Data structuresScience use-constraintLightweight named constraint primitives for RustUse106MIT OR Apache-2.0Data structuresRust patterns use-containmentContainment traits and classifications for RustUse geometry119MIT OR Apache-2.0MathematicsScience use-content-negotiationModels accepted media types, quality values, content preferences, language preferences, and encoding preferences with…80MIT OR Apache-2.0Data structuresDevelopment tools use-contrastPrimitive contrast-ratio helpers106MIT OR Apache-2.0AlgorithmsScience use-controlComposable facade crate for RustUse control-system primitives81MIT OR Apache-2.0AlgorithmsScience use-control-errorPrimitive control error calculation helpers105MIT OR Apache-2.0AlgorithmsScience use-control-signalControl signal validation and saturation helpers106MIT OR Apache-2.0AlgorithmsScience use-cookieSmall cookie utilities for RustUse65MIT OR Apache-2.0Parsing toolsWeb programming use-coordinateCoordinate primitives for the RustUse geometry workspace547MIT OR Apache-2.0MathematicsScience use-correlationCovariance and Pearson correlation helpers over f64 slices.108MIT OR Apache-2.0 use-coxeterCoxeter diagram primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-cpioCPIO archive labels, extensions, and entry metadata primitives for RustUse81MIT OR Apache-2.0CompressionDevelopment tools use-crateComposable crate identity and metadata primitives for RustUse.160MIT OR Apache-2.0Data structuresDevelopment tools use-creaseCrease primitives for the RustUse geometry workspace117MIT OR Apache-2.0MathematicsScience use-cryptoCryptographic algorithm and key metadata labels for RustUse41MIT OR Apache-2.0CryptographyData structures use-csvLightweight CSV delimiter, row, and field helpers for RustUse49MIT OR Apache-2.0EncodingParser implementations use-currencyLightweight currency code primitives for RustUse finance crates150MIT OR Apache-2.0Data structuresParser implementations use-currency-codeSmall ISO 4217-style currency code primitives for RustUse106MIT OR Apache-2.0Internationalization (i18n)Parser implementations use-cursorModels opaque cursors and before, after, next, and previous cursor slots without assuming serialization or secrecy.79MIT OR Apache-2.0Data structuresDevelopment tools use-curveCurve primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-cveCVE identifier and vulnerability metadata primitives for RustUse41MIT OR Apache-2.0Data structuresDevelopment tools use-cvssCVSS severity, vector, and score metadata primitives for RustUse41MIT OR Apache-2.0Data structuresDevelopment tools use-cweCWE weakness identifier and category primitives for RustUse41MIT OR Apache-2.0Data structuresDevelopment tools use-dataFeature-gated facade crate for RustUse data format helpers80MIT OR Apache-2.0EncodingParser implementations use-databaseFeature-gated facade crate for RustUse database primitives63MIT OR Apache-2.0Data structuresDatabase interfaces use-datePrimitive calendar date helpers249MIT OR Apache-2.0AlgorithmsScience use-date-rangePrimitive date-range helpers106MIT OR Apache-2.0AlgorithmsScience use-db-columnPrimitive database column metadata for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-constraintPrimitive database constraint metadata for RustUse80MIT OR Apache-2.0Data structuresDatabase interfaces use-db-coreShared primitive database vocabulary for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-driverPrimitive database driver and backend metadata for RustUse81MIT OR Apache-2.0Data structuresDatabase interfaces use-db-indexPrimitive database index metadata for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-keyPrimitive database key metadata for RustUse80MIT OR Apache-2.0Data structuresDatabase interfaces use-db-migrationPrimitive database migration metadata for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-nameStrongly typed database identifier wrappers for RustUse192MIT OR Apache-2.0Data structuresDatabase interfaces use-db-queryPrimitive database query vocabulary for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-recordPrimitive database record metadata for RustUse81MIT OR Apache-2.0Data structuresDatabase interfaces use-db-relationPrimitive database relation metadata for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-resultPrimitive database result set metadata for RustUse80MIT OR Apache-2.0Data structuresDatabase interfaces use-db-rowPrimitive database row metadata for RustUse80MIT OR Apache-2.0Data structuresDatabase interfaces use-db-schemaPrimitive database schema metadata for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-db-tablePrimitive database table metadata for RustUse80MIT OR Apache-2.0Data structuresDatabase interfaces use-db-transactionPrimitive database transaction metadata for RustUse81MIT OR Apache-2.0Data structuresDatabase interfaces use-db-urlPrimitive database URL and DSN metadata for RustUse79MIT OR Apache-2.0Data structuresDatabase interfaces use-delaunayDelaunay triangulation primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-denoDeno runtime metadata primitives for RustUse83MIT OR Apache-2.0Development tools use-densityDensity, mass, and volume helpers for RustUse133MIT OR Apache-2.0MathematicsScience use-design-tokenFramework-neutral design-token primitives for RustUse79MIT OR Apache-2.0Data structuresGUI use-diagnosticFacade crate for RustUse diagnostic primitives79MIT OR Apache-2.0Data structuresDevelopment tools use-diagnostic-codeStable diagnostic identifier primitives for RustUse131MIT OR Apache-2.0Data structuresDevelopment tools use-diagnostic-labelRenderer-neutral diagnostic label primitives for RustUse132MIT OR Apache-2.0Data structuresDevelopment tools use-diagnostic-levelDiagnostic severity primitives for RustUse131MIT OR Apache-2.0Data structuresDevelopment tools use-diagnostic-messagePlain-text diagnostic message primitives for RustUse153MIT OR Apache-2.0Data structuresDevelopment tools use-diagnostic-reportSimple diagnostic and diagnostic report primitives for RustUse104MIT OR Apache-2.0Data structuresDevelopment tools use-diagnostic-spanGeneric diagnostic source and span primitives for RustUse153MIT OR Apache-2.0Data structuresDevelopment tools use-dihedralDihedral angle primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-dimensionDimension primitives for the RustUse geometry workspace141MIT OR Apache-2.0MathematicsScience use-dimensionsPrimitive media dimension helpers107MIT OR Apache-2.0AlgorithmsScience use-diodePrimitive diode vocabulary for RustUse electronics crates104MIT OR Apache-2.0Data structures use-dirPractical directory path utility primitives49MIT OR Apache-2.0FilesystemParsing tools use-distanceSmall point-to-point distance helpers for RustUse geometry165MIT OR Apache-2.0MathematicsScience use-distributionBasic distribution summaries and histogram helpers over f64 slices.108MIT OR Apache-2.0 use-dkimDKIM signature metadata primitives for RustUse53MIT OR Apache-2.0Data structuresEmail use-dmarcDMARC policy metadata primitives for RustUse55MIT OR Apache-2.0Data structuresEmail use-dnsDNS record-type and DNS name helpers for RustUse.62MIT OR Apache-2.0 use-dockerFeature-gated facade crate for RustUse Docker primitives63MIT OR Apache-2.0Development toolsParser implementations use-docker-buildPrimitive Docker build option helpers for RustUse80MIT OR Apache-2.0Data structuresDevelopment tools use-docker-composeLightweight Docker Compose model primitives for RustUse80MIT OR Apache-2.0Data structuresDevelopment tools use-docker-envPrimitive Docker environment file helpers for RustUse80MIT OR Apache-2.0Development toolsParser implementations use-docker-healthcheckPrimitive Docker healthcheck helpers for RustUse80MIT OR Apache-2.0Data structuresDevelopment tools use-docker-imagePrimitive Docker image reference parsing for RustUse80MIT OR Apache-2.0Development toolsParser implementations use-docker-labelPrimitive Docker and OCI label helpers for RustUse79MIT OR Apache-2.0Data structuresDevelopment tools use-docker-networkPrimitive Docker network mode helpers for RustUse80MIT OR Apache-2.0Development toolsParser implementations use-docker-portPrimitive Docker port mapping parsing for RustUse80MIT OR Apache-2.0Development toolsParser implementations use-docker-registryPrimitive Docker registry and repository reference helpers for RustUse79MIT OR Apache-2.0Development toolsParser implementations use-docker-tagPrimitive Docker tag validation helpers for RustUse79MIT OR Apache-2.0Development toolsParser implementations use-docker-volumePrimitive Docker volume and mount syntax helpers for RustUse80MIT OR Apache-2.0Development toolsParser implementations use-dockerfilePrimitive Dockerfile instruction line helpers for RustUse80MIT OR Apache-2.0Development toolsParser implementations use-dockerignorePrimitive .dockerignore pattern vocabulary for RustUse85MIT OR Apache-2.0Development toolsParser implementations use-document-pathDocument path primitives for RustUse NoSQL data modeling82MIT OR Apache-2.0Data structuresDatabase interfaces use-document-storeDocument-store modeling primitives for RustUse81MIT OR Apache-2.0Data structuresDatabase interfaces use-domainDomain and hostname validation helpers for RustUse.62MIT OR Apache-2.0 use-drawdownPrimitive drawdown vocabulary for RustUse quantitative crates126MIT OR Apache-2.0AlgorithmsFinance use-drupalDrupal metadata primitives for RustUse.82MIT OR Apache-2.0Data structuresDevelopment tools use-dualityGeometric duality primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-dynamicsDynamic marking metadata primitives for RustUse.85MIT OR Apache-2.0Data structuresNo standard library::No dynamic allocation use-earth-constantsReusable Earth and WGS84 constants for RustUse118MIT OR Apache-2.0MathematicsScience use-ecmascriptECMAScript edition and target primitives for RustUse124MIT OR Apache-2.0Development toolsParser implementations use-ecologyFacade crate for primitive RustUse ecology vocabulary79MIT OR Apache-2.0Data structuresScience use-ecosystemPrimitive ecosystem vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-edgePrimitive directed and undirected edge helpers106MIT OR Apache-2.0AlgorithmsScience use-eigenUtility-first eigenvalue and eigensystem primitives for RustUse110MIT OR Apache-2.0MathematicsScience use-elasticityScalar elasticity and mechanics-of-materials helpers for RustUse129MIT OR Apache-2.0MathematicsScience use-electricityElectricity and simple circuit helpers for RustUse106MIT OR Apache-2.0MathematicsScience use-electromagnetismScalar combined electric and magnetic field helpers for RustUse106MIT OR Apache-2.0MathematicsScience use-electron-shellSimple electron shell distribution helpers for RustUse chemistry crates131MIT OR Apache-2.0Data structuresScience use-electronicsFacade crate for RustUse practical electronics primitives80MIT OR Apache-2.0Data structures use-elementSmall chemical element primitives and lookup helpers for RustUse294MIT OR Apache-2.0Data structuresScience use-elevationPrimitive elevation and depth vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-emailFeature-gated facade crate for RustUse email primitives64MIT OR Apache-2.0Data structuresEmail use-email-addressEmail address and mailbox primitives for RustUse128MIT OR Apache-2.0Data structuresEmail use-email-authEmail authentication metadata facade for RustUse38MIT OR Apache-2.0Data structuresEmail use-email-envelopeSMTP envelope identity and path primitives for RustUse95MIT OR Apache-2.0Data structuresEmail use-email-headerEmail header name, value, and field primitives for RustUse97MIT OR Apache-2.0Data structuresEmail use-email-idEmail Message-ID and threading primitives for RustUse80MIT OR Apache-2.0Data structuresEmail use-email-messageEmail message structure primitives for RustUse81MIT OR Apache-2.0Data structuresEmail use-encodingFeature-gated facade crate for RustUse encoding helpers81MIT OR Apache-2.0EncodingText processing use-end-effectorPrimitive end-effector vocabulary for RustUse robotics105MIT OR Apache-2.0Data structuresScience use-endpointModels endpoint names, paths, identifiers, groups, and status labels with validation and display helpers.80MIT OR Apache-2.0Data structuresDevelopment tools use-energyWork and mechanical energy helpers for RustUse132MIT OR Apache-2.0MathematicsScience use-env-keyPrimitive environment variable key vocabulary for RustUse134MIT OR Apache-2.0Data structuresOperating systems use-env-valuePrimitive environment variable value and pair vocabulary for RustUse103MIT OR Apache-2.0Data structuresOperating systems use-env-varEnvironment variable primitives for RustUse CLI-adjacent code104MIT OR Apache-2.0Command-line interfaceRust patterns use-epochPrimitive astronomical epoch vocabulary for RustUse104MIT OR Apache-2.0Data structuresScience use-equationSmall equation-solving primitives for RustUse115MIT OR Apache-2.0MathematicsScience use-escapeEscaping and unescaping helpers for RustUse47MIT OR Apache-2.0EncodingText processing use-eventFeature-gated facade crate for RustUse event primitives.63MIT OR Apache-2.0Data structures use-event-dispatchDispatch status and outcome primitives for RustUse events.83MIT OR Apache-2.0Data structures use-event-envelopeGeneric event envelope composed from RustUse event primitives.80MIT OR Apache-2.0Data structures use-event-handlerSynchronous event handler trait for RustUse event primitives.79MIT OR Apache-2.0Data structures use-event-idLightweight event identifier primitive for RustUse.99MIT OR Apache-2.0Data structures use-event-kindEvent kind labels for RustUse event primitives.99MIT OR Apache-2.0Data structures use-event-logAppend-only in-memory event log wrapper for RustUse events.82MIT OR Apache-2.0Data structures use-event-metadataOrdered string metadata entries for RustUse event primitives.99MIT OR Apache-2.0Data structures use-event-nameLightweight event name primitive for RustUse.99MIT OR Apache-2.0Data structures use-event-payloadGeneric event payload wrapper for RustUse event primitives.82MIT OR Apache-2.0Data structures use-event-simulationSimple event simulation helpers over finite event lists107MIT OR Apache-2.0AlgorithmsScience use-event-sourceLightweight event source primitive for RustUse.99MIT OR Apache-2.0Data structures use-event-statusEvent status labels for RustUse event primitives.80MIT OR Apache-2.0Data structures use-event-streamOrdered in-memory event stream wrapper for RustUse events.80MIT OR Apache-2.0Data structures use-event-targetLightweight event target primitive for RustUse.98MIT OR Apache-2.0Data structures use-event-timestampSystemTime timestamp wrapper for RustUse event primitives.98MIT OR Apache-2.0Data structuresDate and time use-exit-codePortable exit status primitives for RustUse CLI-adjacent code105MIT OR Apache-2.0Command-line interfaceRust patterns use-extensionPractical file extension utility primitives48MIT OR Apache-2.0FilesystemParsing tools use-faceFace primitives for the RustUse geometry workspace119MIT OR Apache-2.0MathematicsScience use-factorPrimitive quantitative factor vocabulary for RustUse127MIT OR Apache-2.0AlgorithmsFinance use-faultPrimitive fault vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-featurePrimitive sequence and genomic feature vocabulary for RustUse104MIT OR Apache-2.0Data structuresScience use-feedbackPrimitive feedback loop helpers for control systems106MIT OR Apache-2.0AlgorithmsScience use-file-namePractical file-name utility primitives50MIT OR Apache-2.0FilesystemParsing tools use-file-stemPractical file stem utility primitives48MIT OR Apache-2.0FilesystemParsing tools use-financeFacade crate for RustUse practical finance primitives79MIT OR Apache-2.0Data structures use-flagPrimitive short and long flag types for RustUse CLI-adjacent code103MIT OR Apache-2.0Command-line interfaceRust patterns use-fluidFluid mechanics scalar helpers for RustUse106MIT OR Apache-2.0MathematicsScience use-focusFocus metadata primitives for RustUse UI81MIT OR Apache-2.0Data structuresGUI use-focus-orderPrimitive focus-order sorting and validation helpers107MIT OR Apache-2.0AlgorithmsScience use-foldingFolding primitives for the RustUse geometry workspace120MIT OR Apache-2.0MathematicsScience use-font-sizePrimitive font-size helpers108MIT OR Apache-2.0AlgorithmsScience use-food-webPrimitive food-web vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-forceForce, weight, and impulse helpers for RustUse132MIT OR Apache-2.0MathematicsScience use-formationPrimitive geologic formation vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-fossilPrimitive fossil vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-framePrimitive robotics frame vocabulary for RustUse105MIT OR Apache-2.0Data structuresScience use-frame-ratePrimitive frame-rate helpers106MIT OR Apache-2.0AlgorithmsScience use-frequencyPrimitive frequency helpers for signal calculations107MIT OR Apache-2.0AlgorithmsScience use-friendTyped Fellow Friends metadata model for RustUse fixture data182MIT OR Apache-2.0Data structuresDevelopment tools use-friend-fixtureDeterministic Fellow Friends fixture records for RustUse159MIT OR Apache-2.0Data structuresDevelopment tools use-friend-markdownSimple markdown rendering helpers for Fellow Friends fixture records107MIT OR Apache-2.0Development toolsText processing use-friend-registryDeterministic query helpers for Fellow Friends fixture records106MIT OR Apache-2.0Data structuresDevelopment tools use-fsComposable facade crate for RustUse filesystem-adjacent primitives82MIT OR Apache-2.0FilesystemParsing tools use-genePrimitive gene identity vocabulary for RustUse106MIT OR Apache-2.0Data structuresScience use-genomic-rangePrimitive genomic range and interval vocabulary for RustUse155MIT OR Apache-2.0Data structuresScience