Firebird Tools

Firebird SQL Database has been existing for so long already. However, not many have created a free and open source Firebird tool or IDE that is really easy to use. Developers are forced to use commercial ones because the free and open source in my opinion are not user-friendly at all. It's just ironic that a very good free and open source DBMS lacks decent free and open source IDE. I would like to create one and post it at sourceforge but I'm not that skilled yet. Hopefully soon. In the meantime, let's just enumerate the existing Firebird Tools currently being used by developers.
1. FlameRobin
2. EMS for Interbase and Firebird Lite
3. IBExpert
4. Lazarus
5. Firebird Maestro

Of these, I like the EMS IDE.