Servetel - Communication management solution
Linphone - Linphone is an internet phone or Voice Over IP phone (VoIP).
EVS7 Inside Sales software - EVS7 Inside Sales software is a platform that allows users to manage their team, power dial their prospects, and can track all of their results, The platform helps users to nurture their leads, accelerate their sales, and they can do all this from a…
Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems
Outreach - Outreach Is Your Sales Communication Platform
Sipdroid - Free and open-source SIP/VoIP Client