Adminer (phpMinAdmin) is a tool for managing content in MySQL databases.

ZeroNet is a decentralized Internet-like network of peer-to-peer users.

Vertabelo is an online tool for database design.

VFront is a dynamic front-end for MySQL or PostgreSQL databases written in PHP and Javascript.

Baïkal is a Cal and CardDAV server, based on sabre/dav, that includes an administrative interface for easy management.