Baraza is a free mobile instant messaging and presence server for Linux.
Connect with all your friends & loved ones - build you own social networks on mobile, or connect with other open IM networks such as Google Talk.
Stay in Control - Decide who sees you online with stealth settings.
Everyone can use it - works with multiple phone types and networks.
Baraza uses the excellent Open Source PostgreSQL RDBMS (v8.2 and above) for all data storage. You therefore need to have a PostgreSQL server installation that Baraza can use.
Sorry, no other databases supported at this time. Perhaps at a future date!