climb in yosemite
Additional projects solve business specific problems such as ERP, CRM, General Ledger, Inventory, and more.

All these projects are available under various open source licenses.  While some place restrictions on  redistribution, all of the projects listed here are available for use in company in-house projects.  All are free of charge, have source code as a basic part of the distribution, and are supported by a large body of developers around the world.