CRM

PHP

Sugar

Autres

http://www.simplecustomer.com

http://www.browsercrm.com
http://www.browsercrm.com/content/view/121/107

http://xrms.sourceforge.net

http://www.oocrm.com/produits/oocrm-sources.html

CiviCRM

Java

openCRX

Centric

Ressources

http://www.java-source.net/open-source/erp-crm (Java)
http://swik.net/CRM+PHP

http://www.insidecrm.com/features/top-open-source-solutions-121307
http://www.elitecrmsoftware.com/open_source_crm.html
http://www.smallbizcrm.com/free-single-user-crm.html, http://www.smallbizcrm.com/free-single-user-crm.html

Discussions

http://mashable.com/2010/05/21/social-crm