Valentina Studio - FREE native database manager for SQLite, MySQL, PostgreSQL, SQL Server and Valentina DB.
SQLite Manager - Manage all your SQLite databases using this lightweight extension for Firefox, Thunderbird...
SQLiteStudio - SQLiteStudio is a cross-platform SQLite database manager
phpMyAdmin - phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.
Lita SQLite Manager - Lita is a free and open source SQLite database administration tool for Windows, MacOSX and Linux.
Adminer - Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP.