asterCRM is a call center software for asterisk based VoIP system, also it has some CRM functions. It provide useful features such as pop-up, predictive dialer, click to call, extension status .... astercrm could work with all asterisk based system.
VGPS is a PHP/MySQL based provisioning system intended to generate vendor-specific configuration files for Voice-over-IP (VoIP) devices via a generic HTTP API.