Firebird is a relational database offering many ANSI SQL-2003 features that runs on Linux, Windows, MacOSX and a variety of other Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used in production systems, under a variety of names since 1981.
Firebird is a commercially independent project of C and C++ programmers, technical advisors and supporters developing and enhancing a multi-platform relational database management system based on the source code released by Borland under the InterBase Public License on the 25th July, 2000.