Rapid applications development tool and libraries for FPC
Personal and small-business finance manager
Open Source Monitoring System for performance and availability.
#1 alternative to Microsoft Project : Project Management & Gantt Chart
GTK+ comic book viewer.
A full featured cross-platform image library
Audio converter and CD ripper for various formats
Read, write and edit metadata
PXell - Online project management.
Contao Open Source CMS (fka TYPOlight)
Java based Open source Voxel Engine for RTS games