Open source. Open possibilities.

Hoppscotch is an open-source API development ecosystem providing a lightweight alternative to Postman and Insomnia for testing and designing APIs.

LastChat is a feature-rich Android AI assistant forked from RikkaHub, offering multi-provider chat, RAG memory, multimodal input, built-in Python/JS engines, and local-first privacy.

Ultralytics OpenAPI generates interactive API docs and typed Python SDKs from OpenAPI 3.0-3.2 specs, with configurable branding, auth, and CLI support.

An unofficial, open-source Python client library for the FINRA API Platform that handles OAuth 2.0 authentication while returning raw httpx responses for the Query, Notification and Submission APIs.

An unofficial, typed TypeScript client for the Alegra API featuring HTTP Basic authentication, async generator-based pagination, rate limit handling with exponential backoff, and zero runtime dependencies.

HTTPie CLI is a modern, user-friendly command-line HTTP client designed for testing, debugging, and interacting with APIs and HTTP servers.

Bruno is an open-source API client for exploring and testing APIs, designed as a lightweight, offline-only alternative to tools like Postman and Insomnia.

Insomnia is an open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC, offering native OpenAPI design, test suites, mocking, a CLI for CI pipelines, and Local, Git or Cloud storage options.

A comprehensive collection of zero-dependency Go client libraries for media automation, metadata, and download service APIs, covering over 60 services.