ICT Innovations, An open source telephony team from Pakistan, working with Asterisk and FreeSWITCH since 2005.

We build dialers, call center, pbx, crm , contact centre software and fax over IP, and we maintain a few open source projects including ICTCore, ICTDialer, ICTPBX and ICTFax . also open source commercial projects based on asterisk ICTContact and ICTBroadcast

Mostly here for the Asterisk side: AMI, load testing at scale, and the interop headaches that come with mixing stacks.