The Stacks

Wing of Developer tools

Libraries, CLIs and infrastructure for building with AI.

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215 developer tools projects in this wing of the Stacks. Review status is shown for every entry.

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Ranked by total stars at the last daily refresh. This is not stars earned during the selected period. Star counts in the AI category are known to be inflated by fake-star campaigns, so activity and license are shown first.

6 projects matching “observability”

doris

apache/doris

Apache Doris is a real-time analytics and hybrid search database for AI agents.

Pushed today.Apache License 2.0JavaDeveloper tools16.2k

voltagent

VoltAgent/voltagent

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

Pushed 7 days ago.MIT LicenseTypeScriptDeveloper tools11.0k

evidently

evidentlyai/evidently

Evidently is an open-source ML and LLM observability framework. Evaluate, test, and monitor any AI-powered system or data pipeline. From tabular data to Gen AI. 100+ metrics.

Pushed 2 months ago.Apache License 2.0Jupyter NotebookDeveloper tools8.1k+17

plano

katanemo/plano

Plano is an AI-native proxy server and data plane for agentic apps. Smart LLM routing, observability, agent orchestration, and guardrails so you stay focused on your agents core logic.

Pushed 19 days ago.Apache License 2.0RustDeveloper tools7.1k+7

cost-xray

tigerless-labs/cost-xray

See what Claude Code and Codex actually send to the API — and what each part costs.

Pushed yesterday.MIT LicensePythonDeveloper tools5.8k

mcp-context-forge

IBM/mcp-context-forge

An AI Gateway, registry, and proxy that sits in front of any MCP, A2A, or REST/gRPC APIs, exposing a unified endpoint with centralized discovery, guardrails and management. Optimizes Agent & Tool calling, and supports plugins.

Pushed today.Apache License 2.0PythonDeveloper tools4.8k+57