Open Source Centric CRM 4.1 released With Expanded Database Support

Centric CRM Releases Open Source Centric CRM 4.1 With Expanded Database Support, New Workflow Best Practices Tool
Can be used with firebird:

Database Support
Centric CRM 4.1’s support for MySQL, IBM DB2 and Oracle 10g databases
is a significant step forward. It brings the total number of supported
databases to eleven (others include PostgreSQL, EnterpriseDB, Microsoft SQL
Server, IBM Cloudscape, Apache Derby, Interbase, Dafodil and Firebird)