DBeaver - DBeaver - Universal Database Manager and SQL Client.
Wetty - Terminal over HTTP and HTTPS.
DataGrip - Tool for SQL and databases
Shell In A Box - Shell In A Box is a web based AJAX terminal emulator that can export arbitrary command line tools...
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Bastillion - Bastillion is an open-source web-based SSH console that centrally manages administrative access to systems.