This has been a harder choice to make. FireBird is the OpenSource result of the fork from
when (August 2000)
made its sources available for free.
Since then, FireBird has reached release 1.xx. According to my personal experience, FireBird is pretty
fast, requires a low memory footprint, has single file databases and a powerful relational structure with
a versioning engine. It's extremely easy to install, is available on almost every platform, can perform
online backups, has got triggers, relations, events, stored procedures, UDFs, ANSI-SQL92 compliance and
much more. Personally, I do like it because it can easily integrate with high level languages and, thanks
to its versioning engine, it can recover and restart in a matter of seconds (or even less :-)).