OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
Snagit - Screen Capture Software for Windows and Mac
YakYak - Desktop client for Google Hangouts
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).