Best Open Source AI & Machine Learning Tools in 2026

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Grit

stars 4.5Kforks 121

Automate code migrations at scale using a pattern-matching DSL

Developer Tools Workflow Automation Coding+4

SWE-agent

stars 19.7Kforks 2.2K

Autonomous AI agent that reads code and resolves GitHub issues

AI Agents LLM Developer Tools+5

Karakeep

stars 26.1Kforks 1.3K

Save links and notes with AI auto-tags, no manual organization

AI Agents Knowledge Management Self Hosted+3

Trieve

stars 2.7Kforks 245

Hybrid search and RAG infrastructure for AI knowledge bases

AI Search Tools RAG LLM+4

Metarank

stars 2.4Kforks 111

Open source personalization and search ranking engine

Search Engine LLMOps AI Search Tools+4

Ploomber

stars 3.6Kforks 241

Build reproducible Python data pipelines with DAG orchestration

Workflow Automation Developer Framework Developer Tools+5

MinIO AIStor

stars 61.2Kforks 7.6K

Hyperscale S3-compatible object storage for AI workloads

Database Cloud Native Kubernetes+4

Qwen

stars 21.3Kforks 1.8K

Alibaba's Apache 2.0 LLM in sizes from small to frontier scale

LLM AI Agents LLMOps+3

OpenLLaMA

stars 7.5Kforks 406

Permissive open LLaMA reproduction in 3B, 7B, and 13B parameters

LLM AI SDK Developer Framework+3

Jina AI

stars 727forks 74

Open source search APIs and MCP tools for RAG and agent workflows

AI SDK AI Search Tools RAG+3

OLMo

stars 1.3Kforks 256

Allen AI research LLM with public weights and open training code

LLM LLMOps AI SDK+4

Dagster

stars 15.6Kforks 2.2K

Asset-based data pipeline orchestration with a built-in catalog

Workflow Orchestration Workflow Automation LLMOps+3

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