Open Source SQL Editor and Database Manager.

Use Beekeeper Studio to query and manage your relational databases, like MySQL, Postgres, SQLite, and SQL Server. Available for Windows, Mac, and Linux.

Beekeeper Studio is a SQL Editor and DB Manager for Windows, MacOS, and Linux. It is 100% open source and free to use.

Version 1.4 includes better SSH tunneling, SQL Server AD connections, and you can, erm, click table cells. Which is good.