YugabyteDB

Gel

Gel, formerly known as EdgeDB, is an open-source data platform built on top of Postgres that replaces traditional tables with schema-defined types connected through graph-style links, letting developers traverse relationships without writing JOINs. It uses EdgeQL, a query language that combines SQL and GraphQL-style concepts with strict typing, and provides code generation and client libraries for full type safety across the stack. Beyond querying, Gel includes built-in authentication covering OAuth, passkeys, magic links, and email/password, plus integrated AI support with automatic embeddings and RAG endpoints. It can run locally with zero-config setup, be exported to plain Postgres, or run on the managed Gel Cloud service, which is AWS-powered and integrates with GitHub and Vercel; the project has around 14,000 GitHub stars and recently joined Vercel while remaining fully open source.

TiDB

TiDB is an open‑source, distributed NewSQL database that delivers horizontal scalability and strong consistency while speaking the MySQL protocol. It is designed for cloud‑native environments, allowing developers and DevOps teams to run transactional and analytical workloads on a single platform. Built on a shared‑nothing architecture, TiDB integrates tightly with Kubernetes and Prometheus, providing real‑time monitoring and automated failover for mission‑critical applications.

HeidiSQL

HeidiSQL is a free and open-source database management tool created in 2002 that lets developers and DBAs connect to and administer MySQL, MariaDB, Microsoft SQL Server, PostgreSQL, SQLite, and Firebird/Interbase servers through a single lightweight interface. It combines a visual table/data editor with a full SQL query console, supporting SSH tunnels, SSL connections, batch data import/export in formats like CSV and JSON, and user privilege management, making it a popular free alternative to phpMyAdmin and paid database GUIs.