OPush is an implement of the Exchange ActiveSync protocol supporting versions 2.5 and 12.1 of the protocol (Exchange 2003 and 2007). It is implemented with Eclipse and OSGi technologies and allows customized data providers. A default data provider implementation is available for the OBM groupware solution.
iDempiere is a complete business suite. It includes functionalities like ERP, CRM, SCM, Web store, financial analysis, etc. It has been translated into many languages. It is based on the famous Compiere/Adempiere projects and has been re-architected with OSGi for even better extensibility options.