Open source. Open possibilities.

An open-source, single-executable Firebase alternative built with Rust and SQLite, featuring type-safe APIs and a WebAssembly runtime.

pgfathom is a read‑only CLI tool that discovers undocumented PostgreSQL relationships by analyzing catalog data, usage evidence, and statistics. It outputs verdicts (broken, confirmed, weak) and reviewable SQL scripts to help fix hidden foreign keys.

DSH engineer-level database plugin offering six tools—sql_list/query/exec/schema/stats/health—supporting SQLite, MySQL, and PostgreSQL with multiple connections, featuring read-only whitelisting, write approval gates, lexical read-only protection, streaming row clamping, and configurable timeouts.

ChaosSQL is a deterministic concurrency and isolation fuzzer for PostgreSQL, MySQL and SQLite. It schedules concurrent transactions, detects invariant violations such as lost updates and write skew, shrinks failures to minimal reproductions, and can guard CI pipelines against regressions.

OwnChat is a self-hosted desktop chat application built with Java Swing and sockets, using Oracle Database for storage. It supports account creation, contacts, real-time messaging, chat history, themes, and online status tracking.

DBeaver is a free, multi-platform database tool and SQL client for developers, DBAs and analysts, supporting 100+ database drivers via JDBC/ODBC, with SQL editor, data editor, ER diagrams, import/export and AI chat integration.

Supabase is an open-source Postgres development platform combining hosted database, authentication, auto-generated REST/GraphQL and realtime APIs, edge functions, file storage, an AI/vector toolkit, and a dashboard, with official and community client libraries.

ChartDB is an open-source, web-based database diagram editor that lets you visualize schemas instantly with a single query. No installation or password needed. Supports multiple databases and AI-powered SQL export.

Directus wraps any SQL database with auto-generated REST and GraphQL APIs, a visual management Studio, and a native MCP server for AI agents. It supports granular permissions and self-hosting.

bytdb is an embedded, pure Go SQL database that is Postgres-compatible, offering a single-file relational store with no external server or cgo dependencies.

Kahuna is an open-source distributed systems toolkit providing distributed locking, a fault-tolerant key/value store, and globally ordered ID sequencing, built on Raft consensus and MVCC.

Microservice crystal structure search using COD data, built with TypeScript, Node.js, Express, React, MongoDB, Redis, RabbitMQ, Docker Swarm, and Traefik for fast substructure queries and a server‑rendered web UI.

LiteDB is a lightweight, serverless NoSQL embedded database for .NET that stores data in a single file, offering ACID transactions, LINQ queries, and a MongoDB‑like API while remaining under 450 KB.

Open-source documentation website for Harper, a fullstack serverful Node.js application platform. Built with Docusaurus and hosted at docs.harper.fast. Community contributions welcome via issues and pull requests.

PostgREST serves a fully RESTful API from any existing PostgreSQL database. It handles JWT authentication, delegates authorization to database roles, supports schema-based versioning, generates OpenAPI docs, and pushes data validation and JSON serialization into SQL.

dbwidgets provides PySide6 data-aware widgets and dataset components that mirror Delphi's Data Controls. It supports SQLite, PostgreSQL, MySQL, and MariaDB, automatically exposing schema, master‑detail relationships, and editable UI controls such as grids, forms, and navigators.

Read-only-by-default Model Context Protocol (MCP) server for Microsoft SQL Server, providing metadata discovery, parameterized SELECT-only queries, execution plan analysis for slow query diagnosis, profile-based multi-connection configuration, and optional per-profile write access, shipped as a .NET NuGet tool.

mq-db is a Rust-based embedded database that treats Markdown as a structured, hierarchical store with interval indexing, supporting SQL and mq queries, full-text search, and write‑back editing.

Turso Database is an in-process SQL database written in Rust and compatible with SQLite, adding an experimental PostgreSQL frontend, multi-language bindings, MVCC concurrency, change data capture and vector support.

Source code for the Apache Doris official website (doris.apache.org), built with Docusaurus 3. Hosts multilingual documentation, blog posts, and community guides for Apache Doris, a real-time MPP analytical database.