instashare - Share your photos to instagram from your mac
Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
BlackHole File Transfer - Blockchain-based file transfer. Designed for everyday use.
tSIP - tomeko.net/software: SIP client for Windows.
ToffeeShare - Send files of any size directly from your device, without ever storing anything online.
YakYak - Desktop client for Google Hangouts