I'm proud to share with you guys the new free tool called OmniDB, of which I'm one of the collaborators: http://www.omnidb.com.br/

It's a tool written in ASP.NET/C# for database managing. It's web based, runs on any operating system, and currently the supported RDBMS are Firebird, MySQL, Oracle, PostgreSQL and SQLite.

I already wrote an article on CodeProject: http://www.codeproject.com/Tips/1078...nt?fid=1900690

I'm using it on a daily basis, and OmniDB is proving useful and efficient. Check it out!