Open Source Radar

GitHub Radar

A reviewed watchlist for repositories that matter to the open-model ecosystem. Star counts and repository update times make it easy to compare the projects readers are watching.

37 projects tracked · Stars and update times checked July 27, 2026

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Local inference

Ollama ↗

A local runtime for downloading, serving and testing a broad set of open models.

★ 177KMIT

Model framework

Transformers ↗

Hugging Face’s model-definition library for training and inference across text, vision and audio.

★ 163KApache-2.0

AI interface

Open WebUI ↗

A self-hosted interface for working with Ollama and OpenAI-compatible model APIs.

★ 146.9KLicense not listed

Agent framework

LangChain ↗

A widely used platform for building applications and agent workflows around language models.

★ 142.6KMIT

Generative media

ComfyUI ↗

A node-based graphical interface and backend for modular diffusion-model workflows.

★ 122.4KGPL-3.0

Local inference

llama.cpp ↗

A compact C/C++ implementation for efficient local LLM inference across many devices.

★ 121.7KMIT

Inference serving

vLLM ↗

A high-throughput, memory-efficient serving engine for large language and multimodal models.

★ 87.3KApache-2.0

RAG & agents

RAGFlow ↗

A retrieval-augmented generation engine that combines document retrieval with agent capabilities.

★ 86.1KApache-2.0

AI coding agents

OpenHands ↗

An open platform for AI-driven software development workflows.

★ 82.2KLicense not listed

Fine-tuning

LLaMA-Factory ↗

A unified toolkit for fine-tuning and evaluating a broad range of language and vision-language models.

★ 73.5KApache-2.0

Agent framework

AutoGen ↗

Microsoft’s framework for programming multi-agent applications and tool-driven workflows.

★ 60KCC-BY-4.0

Agent framework

CrewAI ↗

A framework for orchestrating collaborative role-based AI agents.

★ 56.2KMIT

RAG & data

LlamaIndex ↗

A framework for document agents, retrieval workflows and connecting LLMs to data.

★ 51.1KMIT

Vector database

Milvus ↗

A cloud-native vector database for scalable approximate-nearest-neighbour search.

★ 45.4KApache-2.0

Training & inference

DeepSpeed ↗

A distributed deep-learning optimization library for efficient training and inference.

★ 42.8KApache-2.0

Agent framework

LangGraph ↗

A library for building resilient, stateful agent workflows.

★ 38.2KMIT

Vector database

Qdrant ↗

A high-performance vector database and search engine for AI applications.

★ 33.6KApache-2.0

Observability

Langfuse ↗

An open AI-engineering platform for LLM evaluation, observability and prompt management.

★ 31.9KLicense not listed

Inference serving

SGLang ↗

A high-performance serving framework for large language and multimodal models.

★ 30.8KApache-2.0

Vector database

Chroma ↗

Open search infrastructure for building AI applications around embeddings and retrieval.

★ 28.9KApache-2.0

Agent framework

Semantic Kernel ↗

Microsoft’s SDK for integrating LLMs, memory and tool use into applications.

★ 28.4KMIT

Apple silicon

MLX ↗

Apple’s array framework for machine learning research and efficient on-device model work.

★ 27.7KMIT

RAG & agents

Haystack ↗

A modular orchestration framework for production-ready retrieval and agent pipelines.

★ 26KApache-2.0

Testing & safety

Promptfoo ↗

A CLI and CI toolkit for testing prompts, agents and RAG systems.

★ 23.6KMIT

Fine-tuning

PEFT ↗

Hugging Face’s parameter-efficient fine-tuning library for adapting foundation models.

★ 21.5KApache-2.0

Fine-tuning

TRL ↗

A library for training transformer language models with reinforcement learning.

★ 18.9KApache-2.0

Agent framework

PydanticAI ↗

A type-safe Python framework for building production AI agents.

★ 18.8KMIT

Inference serving

TensorRT-LLM ↗

NVIDIA’s optimized runtime and APIs for efficient LLM inference on its GPUs.

★ 14.2KLicense not listed

Training & inference

LitGPT ↗

A collection of high-performance LLM recipes for pretraining, fine-tuning and deployment.

★ 13.6KApache-2.0

Evaluation

LM Evaluation Harness ↗

A framework for few-shot evaluation of language models.

★ 13.4KMIT

Inference serving

OpenLLM ↗

A server for exposing open-source models through OpenAI-compatible cloud APIs.

★ 12.4KApache-2.0

Fine-tuning

Axolotl ↗

A streamlined toolkit for fine-tuning language and vision-language models.

★ 12.3KApache-2.0

Inference serving

Text Generation Inference ↗

Hugging Face’s production text-generation server for deploying large language models.

★ 10.9KApache-2.0

Inference serving

Triton Inference Server ↗

NVIDIA’s optimized cloud and edge serving platform for a range of model frameworks.

★ 10.9KBSD-3-Clause

Observability

Phoenix ↗

An open platform for AI observability and evaluation.

★ 10.8KLicense not listed

Evaluation

OpenCompass ↗

An LLM evaluation platform spanning models and more than one hundred datasets.

★ 7.2KApache-2.0

Deployment

KServe ↗

A Kubernetes-based platform for scalable generative and predictive AI inference.

★ 5.7KApache-2.0