Why Firebird?

From http://www.mamaliz.org/blogs/entropy/archives/2005/09/why_firebird.html

"I am trying to move from using mckoi as my default test database to firebird. I really didn't want to do this, but I also cannot afford to buy an odbc driver for mckoi. Also, I am trying to move all my gobs stuff into 3 different languages, java (it is there already), C#, and ruby. mckoi only works for one of them, firebird works for all of them. I can also use firebird with NEO, Spring for Net, and NHibernate. Firebird wins."