Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
Uppy.io - Next open source file uploader for web browsers
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
transfer.sh - Easy file sharing from the command line
tSIP - tomeko.net/software: SIP client for Windows.
BlackHole File Transfer - Blockchain-based file transfer. Designed for everyday use.