Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
Zeplin - Collaboration app for UI designers & frontend developers
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
tSIP - tomeko.net/software: SIP client for Windows.
ActiveWords - Auto correct on steroids