Outreach - Outreach Is Your Sales Communication Platform
3CX - Hosted PBX with CRM integration and mobile apps
LevelEleven - LevelEleven is a sales performance optimization platform.
CallHub - Predictive Call Center, Voice and Text Broadcasting app
Ambition - Increase employee productivity in a fun, sustainable way. Fantasy Football adapted for the work environment
Asterisk - An open source telephony switching and private branch exchange service for Linux.