FreeB was the first GPL Medical Billing Engine. FreeB supports the HCFA 1500 and X12 837p 4010a formats. FreeB 2.0 (PHP) is developed by Uversa and SynSeer. FreeB 1.0 (Perl) is still used by the OpenEMR project. FreeB 1.0 was rewritten as REMITT which used by the FreeMED project.
