Need A Progressive Dialler W/ Lead Management System

Please help or point me in the right direction.

I’m looking to setup a small call center of about 8 to 10 people using Soft phones on our current Asterisk system. We’ve got all the leads, channels and hardware needed, however I now need a progressive dialler W/ lead management system to help automate the process. Anyone here have experience in this who could point me to a reliable popular commercial or open source solution for this?

I’m more or less looking for something along the lines of something like this …
vanillasoft.com/vanillasoft/demo.html

Thanks…