GoAutoDial (formerly VicidialNOW) is an enterprise-grade open source dialer system. It automatically installs Vicidial, Mysql, PHP, Asterisk, VtigerCRM and other components to have a fully functional open source predictive dialer system. It has out of the box support for Sangoma and Digium telephony hardware and is scalable to hundreds of seats.
GoAutoDial is totally web-based. Everything is done within your web browser. From database administration, dialer and PBX configuration to network settings all in a web GUI.