Pro/PDM ProPDM was the first PDM system written by PTC for ProEngineer. This is a detailed description of the product. http://www.msctech.com/propdm.htm

Concurrent Systems Inc Provides product data management solutions including Pro/INTRALINK, Pro/ENGINEER and Microsoft Office integration. http://www.csi-seattle.com/

PDMware, Inc. Provides database driven document and product data management software for use with PRO/Engineer, as well as related consulting services. http://www.pdmware.com/index.html

Windchill Developed by PTC. A comprehensive, integrated suite of applications designed to manage the entire product and process lifecycle. Windchill leverages the Internet and the World Wide Web. http://www.ptc.com/appserver/it/icm/cda/icm01_list.jsp?group=201&num=1&show=y&keyword=37

Dutch Pro/ENGINEER Users Group The Pro/ENGINEER Users Group for the Dutch Speaking Users in the Benelux. http://www.ptcuser.nl/