Top GRAPH GitHub Repositories & Tools (2026)

ArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.

🚀 LangGraph for Java is a library for Graph Engineering, designed to build sophisticated AI agentic architectures within the Java ecosystem. It works seamlessly with both Langchain4j and Spring AI.

Open-source AI Security Operations Center: alert fusion, LLM-agent triage, MITRE ATT&CK investigation, and a replayable decision ledger for every agent step. Self-hostable, runs with no API keys, MIT licensed. Ships an MCP server for Claude, Cursor and Continue.

Python Toolkit for Causal and Probabilistic Reasoning

AI conversations that actually remember. Never re-explain your project to your AI again. Join our Discord: https://discord.gg/tyvKNccgqN

Deterministic, local-first memory and guardrails for AI coding agents with no LLM in the hot path.

Open source compliance automation for SOC 2, GDPR, ISO27001, NIST 800-53, and more

Grafeo is a pure-Rust, high-performance graph database that can be embedded as a library or run as a standalone database, with optional in-memory or persistent storage. Grafeo supports both LPG and RDF and all major query languages.

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

Cryptography Toolkit

A debugging and profiling tool that can trace and visualize python code execution

Framework-aware code intelligence MCP server — 88 framework integrations, 81 languages, 72.7% fewer input tokens to review a pull request, comprehension at parity

📊 The concise and progressive visualization grammar.

N.I.N.A. (Nighttime Imaging 'N' Astronomy) - Advanced astrophotography sequencing software for Windows, supporting full automation of imaging sessions.

Open-source research workspace for connecting sources, evidence, notes and ideas. Built for academic research with Zotero integration. Available on MacOS, Windows and Linux.

Media asset management and broadcast automation system

Get a flamegraph anywhere in your code base. Powered by stackprof, rbspy, and speedscope

Nornicdb is a distributed low-latency, Graph+Vector, Temporal MVCC with all sub-ms HNSW search, graph traversal, and writes. Using Neo4j Bolt/Cypher and qdrant's gRPC means you can switch with no changes while adding intelligent features like schemas, managed embeddings, reranking+llm, GPU accel, Auto-TLP, Policy-based Memory Decay, and MCP server.

MaterialX is an open standard for the exchange of rich material and look-development content across applications and renderers.

Neo.mjs is a self-evolving software organism: a professional end-to-end AI engineering team whose cross-model swarm inhabits live apps via Neural Link, Active Hybrid GraphRAG, DreamService, and self-healing loops.