# Free open-source developer tools

> Debuggers, LLM gateways and other open-source tools developers use every day.

Free tools: popular open-source projects that do not replace a paid product.

## Projects, ranked
1. [FreeLLMAPI](https://repoquarry.dev/projects/freellmapi.md): Self-hosted router that pools free-tier LLM provider keys behind one OpenAI-compatible API, for developers and coding agents. Commercial use: Confirmed.
2. [RAD Debugger](https://repoquarry.dev/projects/raddebugger.md): Native graphical debugger for x64 programs on Windows (Linux in early stages), with a fast linker and its own debug-info format. Commercial use: Confirmed.
3. [billion-context](https://repoquarry.dev/projects/billion-context.md): Local proxy and plugin that compresses a coding agent's conversation history so long sessions fit in a small context window. Commercial use: Partial.
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Source: RepoQuarry (https://repoquarry.dev/categories/developer-tools). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.