Tangerine Index lists products launched since ChatGPT and people's reactions to them.
okf-agent-memory
github.com
Git-native persistent memory for AI coding agents. Implements Google OKF v0.2 with sub-300µs in-memory BM25 search, embedded MCP server, and progressive disclosure. Slashes token bloat by 80% with zero external databases or dependencies. Built in pure Go.
Open source
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MCP Memory
Fast Agent Memory Using Google's OKF and SQLite FTS5
engram
Persistent memory system for AI coding agents. Agent-agnostic Go binary with SQLite + FTS5, MCP server, HTTP API, CLI, and TUI.
I replaced vector databases with Git for AI memory (PoC)
Git Based Memory Storage for Conversational AI Agent
Agentmemory
Persistent memory for Claude Code, Codex & coding agents
mcp-memory-service
Open-source persistent memory for AI agent pipelines (LangGraph, CrewAI, AutoGen) and Claude. REST API + knowledge graph + autonomous consolidation.