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Free universal database tool and SQL client

ClickHouse® is a real-time analytics database management system

This is a repo with links to everything you'd ever want to learn about data engineering

Apache Spark - A unified analytics engine for large-scale data processing

DuckDB is a high-performance analytical database system

TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.

Free, simple, and intuitive online database diagram editor and SQL generator.

The flexible backend for all your projects 🐰 Turn your DB into a headless CMS, admin panels, or apps with a custom UI, instant APIs, auth & more.

ORM

A scalable, distributed, collaborative, document-graph database, for the realtime web

CockroachDB — the cloud native, distributed SQL database designed for high availability, effortless scale, and control over data placement.

Feature-rich ORM for modern Node.js and TypeScript, it supports PostgreSQL (with JSON and JSONB support), MySQL, MariaDB, SQLite, MS SQL Server, Snowflake, Oracle DB, DB2 and DB2 for IBM i.

Chat2DB is a free, cross-platform, local-first database client and SQL workspace for developers, DBAs, analysts, and data teams. Connect to 40+ databases, manage data, edit and run SQL, and use your own AI model to generate, explain, and optimize queries. Available on desktop, web, Docker, and CLI, with MCP support.

Apache Flink

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

MyBatis SQL mapper framework for Java

QuestDB is a high performance, open-source, time-series database

The official home of the Presto distributed SQL query engine for big data

Apache Doris is a real-time analytics and hybrid search database for AI agents.