RAG and search: tools for developers

Retrieval-augmented tools, vector databases, embeddings and semantic search. An entry can appear under several use cases when its topics or description provide several explicit signals.

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144 entries in this view.

Tool ranking

Ranked by measured growth, normalized across sources. Raw values keep their source-specific window, shown under each tool; a change requires at least two snapshots from the last 7 days.

  1. 1

    Skill
    Active

    Persistent memory for Claude Code and 6 other CLI agents, stored as plain markdown in your Obsidian vault. Stop re-explaining your projects, decisions and people every session. 45 commands: hybrid semantic search, self-rewriting notes,…

    PythonLicense: MIT
    • agent-skills
    • ai-agents
    • ai-note-taking
    • ai-second-brain
    • anthropic

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/eugeniughelbur/obsidian-second-brain ~/.claude/skills/obsidian-second-brain

    4 314GitHub stars+73 (+1.7 %)
  2. 2

    Other
    Active

    Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/

    RustLicense: Apache-2.0
    • ai-search
    • ai-search-engine
    • embeddings-similarity
    • hnsw
    • hybrid-search

    githubmeasured growthOpen source ↗

    34 377GitHub stars+127 (+0.37 %)
  3. 3

    Skill
    Active

    Agent Skills for NVIDIA products — install into Claude Code, Codex, and other coding agents to run Physical AI, robotics, simulation, CUDA, and RAG workflows end to end.

    PythonLicense: Apache-2.0
    • agent-skills
    • agentic-ai
    • ai-agents
    • claude-code
    • codex

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/NVIDIA/skills ~/.claude/skills/skills

    3 194GitHub stars+61 (+1.9 %)
  4. 4

    Skill
    Active

    Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory across sessions with a self-hosted knowledge graph engine.

    PythonLicense: Apache-2.0
    • agent-memory
    • agent-skills
    • ai
    • ai-agents
    • ai-memory

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/topoteretes/cognee ~/.claude/skills/cognee

    30 446GitHub stars+117 (+0.39 %)
  5. 5

    App
    Active

    Open Source AI Platform - AI Chat with advanced features that works with every LLM

    Python
    • ai
    • ai-chat
    • chatgpt
    • chatui
    • enterprise-search

    githubmeasured growthOpen source ↗

    31 916GitHub stars+101 (+0.32 %)
  6. 6

    Other
    Active

    Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

    GoLicense: Apache-2.0
    • anns
    • cloud-native
    • diskann
    • distributed
    • embedding-database

    githubmeasured growthOpen source ↗

    45 962GitHub stars+106 (+0.23 %)
  7. 7

    Other
    Active

    【低代码v2.0，一句话即可生成整个系统】企业级AI低代码平台，一键生成前后端代码甚至整个系统。 AI Skills 一句话画流程、设计表单、生成报表、大屏。内置 AI应用平台涵盖：AI聊天、知识库、流程编排、MCP插件等，兼容主流大模型。引领AI低代码「Skills 生成 → 在线配置 → 代码生成 → 手工合并->AI修改」开发模式，解决 Java 项目 90% 重复工作，提高效率又不失灵活。

    JavaLicense: Apache-2.0
    • activiti
    • agent
    • ai
    • antd
    • claude-code

    githubmeasured growthOpen source ↗

    47 624GitHub stars+98 (+0.21 %)
  8. 8

    Skill
    Active

    Give your AI a real, persistent memory. The open-source system plus templates that turn an Obsidian vault into your AI's working memory. No vector database, just markdown.

    • agent-memory
    • ai
    • ai-agents
    • ai-memory
    • anthropic

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/jaredrhod/ai-memory-vault ~/.claude/skills/ai-memory-vault

    615GitHub stars+23 (+3.9 %)
  9. 9

    MCP
    Active

    🔥 MaxKB is an open-source platform for building enterprise-grade agents. 强大易用的开源企业级智能体平台。

    PythonLicense: GPL-3.0
    • agent
    • agentic-ai
    • chatbot
    • deepseek-r1
    • knowledgebase

    githubmeasured growthOpen source ↗

    22 710GitHub stars+70 (+0.31 %)
  10. 10

    MCP
    Active

    Semantic search and pattern discovery for Obsidian and markdown vaults.

    TypeScript

      mcpmeasured growthOpen source ↗

      59GitHub stars+7 (+13.5 %)
    • 11

      Agent
      Active

      FastGPT is a knowledge-based platform built on the LLMs, offers a comprehensive suite of out-of-the-box capabilities such as data processing, RAG retrieval, and visual AI workflow orchestration, letting you easily develop and deploy complex…

      TypeScript
      • agent
      • claude
      • deepseek
      • llm
      • mcp

      githubmeasured growthOpen source ↗

      29 561GitHub stars+67 (+0.23 %)
    • 12

      Skill
      Active

      A persistent, unified memory layer for all your AI agents (e.g. Claude Code, Codex, DSH), backed by Markdown and Milvus.

      PythonLicense: MIT
      • agent
      • agent-memory
      • ai-agents
      • claude-code
      • claude-code-plugin

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add zilliztech/memsearch

      2 560GitHub stars+32 (+1.3 %)
    • 13

      App
      Dormant

      Enterprise-grade database architect, security auditor and production consultant for Supabase — Claude Code Skill

      TypeScriptLicense: MIT
      • anthropic
      • claude-code
      • claude-code-skill
      • database-architect
      • multi-tenant

      githubmeasured growthOpen source ↗

      3GitHub stars+1 (+50.0 %)
    • 14

      Other
      Active

      Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for…

      PythonLicense: Apache-2.0
      • agent-framework
      • agentic-ai
      • agentic-rag
      • agents
      • ai

      githubmeasured growthOpen source ↗

      26 408GitHub stars+56 (+0.21 %)
    • 15

      Library
      Active

      Opiniated RAG for integrating GenAI in your apps 🧠 Focus on your product rather than the RAG. Easy integration in existing products with customisation! Any LLM: GPT4, Groq, Llama. Any Vectorstore: PGVector, Faiss. Any Files. Anyway you…

      Python
      • ai
      • api
      • chatbot
      • chatgpt
      • database

      githubmeasured growthOpen source ↗

      39 491GitHub stars+53 (+0.13 %)
    • 16

      Other
      Active

      Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.

      TypeScriptLicense: Apache-2.0
      • agent-workflow
      • agentic-workflow
      • agents
      • ai
      • aiagents

      githubmeasured growthOpen source ↗

      29 537GitHub stars+48 (+0.16 %)
    • 17

      MCP
      Active

      Google NotebookLM over MCP + a local HTTP REST API. Citation-backed Q&A, audio/video/content generation, multi-account rotation. For Claude Code, Codex, Cursor, n8n, Zapier, Make.

      TypeScriptLicense: MIT
      • agentic-skill
      • anthropic
      • automation
      • citations
      • claude-code

      githubmeasured growthOpen source ↗

      173GitHub stars+8 (+4.8 %)
    • 18

      Other
      Active

      The #1 AI Harness for Building Resumes, PDFs, Cover Letters & more, locally with 100+ LLMs support.

      TypeScriptLicense: Apache-2.0
      • applicant-tracking-system
      • ats
      • hacktoberfest
      • machine-learning
      • natural-language-processing

      githubmeasured growthOpen source ↗

      28 328GitHub stars+34 (+0.12 %)
    • 19

      Other
      Active

      剧本分镜工具智能体（PenShot）：电影/动漫/短剧/小说/剧本→分镜→片段→prompt | 基于 LangGraph+LLM，自动解析任意格式剧本，生成 Sora/Veo/Runway 等模型可用的连贯text-to-video提示词。保持角色/剧情跨片段一致，支持 MCP/REST API/函数调用 | Python库 + A2A集成。（LLM-powered screenplay-to-video-prompt agent. Break scripts into…

      PythonLicense: MIT
      • agent-to-agent
      • ai-filmmaking
      • ai-video-generation
      • character-consistency
      • function-calling

      githubmeasured growthOpen source ↗

      160GitHub stars+7 (+4.6 %)
    • 20

      Skill
      Active

      🤖 Curated AI OSINT resources — Google dorks, Shodan queries, GitHub dorks, and techniques to discover exposed LLM endpoints, leaked AI API keys, misconfigured vector databases, and unprotected AI agents

      • agent-skills
      • ai-osint
      • ai-security
      • bug-bounty
      • clawhavoc

      githubmeasured growthOpen source ↗

      Install git clone https://github.com/7WaySecurity/ai_osint ~/.claude/skills/ai_osint

      161GitHub stars+7 (+4.5 %)
    • 21

      Agent
      Active

      Utilities to spin up Pydantic AI agents with a few additional enhancements and integrations

      PythonLicense: MIT
      • a2a
      • agents
      • embeddings
      • mcp
      • pydantic-ai

      githubmeasured growthOpen source ↗

      5GitHub stars+1 (+25.0 %)
    • 22

      Agent
      Active

      Incremental engine for long horizon agents 🌟 Star if you like it!

      RustLicense: Apache-2.0
      • agentic-data-framework
      • ai
      • ai-agents
      • change-data-capture
      • codebase-intelligence

      githubmeasured growthOpen source ↗

      11 459GitHub stars+29 (+0.25 %)
    • 23

      Skill
      Active

      Andrej Karpathy's LLM Wiki pattern as a skill & Claude Code plugin — turn accumulated sources into a self-maintaining, scalable markdown knowledge base.

      TypeScriptLicense: MIT
      • ai-tools
      • claude-code-plugin
      • claude-code-skill
      • codex-skill
      • cursor

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add praneybehl/llm-wiki-plugin

      99GitHub stars+5 (+5.3 %)

    Learning resources

    Ranked by measured growth, normalized across sources. These resources remain available separately and do not take part in the main tool ranking.

    1. 1

      lit-review-agent-tools

      MCP
      ActiveOpen source ↗

      🤖 The strongest curated list of open-source AI-agent tools for literature review — 70+ tools across 11 categories (Claude Code skills, deep research, MCP servers, PDF parsing, systematic review). 面向智能体文献综述的最强工具大全。

      PythonLicense: CC0-1.0
      • academic-research
      • ai-agents
      • awesome
      • awesome-list
      • claude-code
      githubResourcemeasured growth
      16GitHub stars+3 (+23.1 %)
    2. 2

      ai-engineering-hub

      Agent
      ActiveOpen source ↗

      In-depth tutorials on LLMs, RAGs and real-world AI agent applications.

      Jupyter NotebookLicense: MIT
      • agents
      • ai
      • llms
      • machine-learning
      • mcp
      githubResourcemeasured growth
      37 263GitHub stars+46 (+0.12 %)