TinyERP has been replaced by openerp, in october 2008. Check the openerp website for more information.
Small, powerful, full featured WYSIWYG editor
Arrowbase is a collection of tools for backup persoses. Together they combine a backup system that can be used on more then one Operating system. This makes the project not only widely spread but portable as wel.
Components (Products) for Plone in educational settings (eduplone). Plone is an enterprise CMS based on Zope/CMF.
Electronic trading apps