Freemium
Great Expectations
Open SourcePipelines & ETL · Data & Analytics
The data quality standard — declare expectations about your data, validate pipelines and generate data docs.
data-qualityvalidationpipelines
Browse the complete directory — use filters to narrow down.
Pipelines & ETL · Data & Analytics
The data quality standard — declare expectations about your data, validate pipelines and generate data docs.
API Protocols · Backend
High-performance, open-source RPC framework over HTTP/2 with protobuf.
Compression & Optimization · Image & Media
Open-source video transcoder with presets for every device.
Smart Contracts · Web3 & Blockchain
The Ethereum development environment — compile, test, debug and deploy smart contracts with a rich plugin ecosystem.
Passwords & IDs · Security
Manage secrets, certificates and encryption centrally.
Programming Languages
Official site for the purely functional programming language.
ORMs · Backend
Instant GraphQL APIs over your databases with permissions built in.
UI Libraries · Frontend
Unstyled, accessible React and Vue primitives (dialogs, menus, comboboxes) from the Tailwind team.
Agent & LLM Frameworks · AI for Developers
Open-source LLM observability — logging, caching, rate limiting and cost tracking behind a one-line proxy.
Orchestration · DevOps
The package manager for Kubernetes applications.
UI Libraries · Frontend
Beautiful Tailwind + React components (formerly NextUI).
Package Managers · Development Environment
The missing package manager for macOS and Linux.
Frameworks · Backend
Ultrafast web framework that runs on any JS runtime and edge.
API Clients · API Tools
Lightweight, open-source API development ecosystem in the browser.
Frameworks · Frontend
Access modern browser features directly from HTML, no JS build needed.
API Clients · API Tools
User-friendly HTTP client for the CLI with JSON-first syntax.
Models & LLM APIs · AI for Developers
The AI community hub: models, datasets, spaces and libraries.
Internationalization · Frontend
The de-facto JavaScript i18n framework — namespaces, plurals, interpolation and plugins for every framework.
Icons · Frontend
Unified framework for using 200,000+ icons from many icon sets.
Conversion · Image & Media
Classic CLI suite for creating, editing and converting images.
NoSQL · Database
Purpose-built time-series database for metrics and events.
Design Tools · Design & Prototyping
Free, open-source professional vector graphics editor.
API Clients · API Tools
Open-source API client for REST, GraphQL and gRPC by Kong.
Cross-Platform · Mobile Development
Cross-platform SDK using web technologies for hybrid apps.