#open-source

A JavaScript/TypeScript SDK for Hiero: A Javascript toolkit for creating, updating, and interacting with on-ledger assets and smart contracts on Hedera and other Hiero networks

A local-first workspace for chat, private knowledge, artifacts, and isolated model-driven work. Self-hosted. Provider-flexible. Apache 2.0.

💌 Mail app for Nextcloud

Open-source observability & evaluation platform for AI agents and coding agents. Trace LLMs, tools, prompts, costs & agent workflows with OpenTelemetry.

Persistent data centric security that extends owner control wherever data travels

Semantic parser for API specifications

ngDiagram – open-source Angular library for interactive diagrams, node-based editors, and workflow builders. Angular-first: signals and templates.

Temporal .NET SDK

Temporal Java SDK

Open-source observability for your GenAI or LLM application, based on OpenTelemetry

The U.S. Web Design System helps the federal government build fast, accessible, mobile-friendly websites.

An AI Assistant that’s easy to setup, does your work 24/7, knows your preferences and gets better over time.

Open-source, self-hosted CMS platform on AWS serverless (Lambda, DynamoDB, S3). TypeScript framework with multi-tenancy, lifecycle hooks, GraphQL API, and AI-assisted development via MCP server. Built for developers at large organizations.

AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework

Lightweight UI components for Vue.js based on Bulma

CiviCRM (Core Application and Framework)

Mumble is an open-source, low-latency, high quality voice chat software.

:zap: Activity app for Nextcloud

Codebase intelligence for AI and humans: code health scores, auto-generated docs, git analytics, dead code detection, and architectural decisions via MCP.

Ongoing Storj v3 development. Decentralized cloud object storage that is affordable, easy to use, private, and secure.

A fully open source & end-to-end encrypted note taking alternative to Evernote.

:triangular_ruler: Ts.ED is a Node.js and TypeScript framework on top of Express to write your application with TypeScript (or ES6). It provides a lot of decorators and guideline to make your code more readable and less error-prone. ⭐️ Star to support our work!

An open source Valkey client library that supports Valkey, and Redis open source 6.2, 7.0 and 7.2. Valkey GLIDE is designed for reliability, optimized performance, and high-availability, for Valkey and Redis OSS based applications. GLIDE is a multi language client library, written in Rust with programming language bindings