CThruView Transparent Image Viewer - CThruView is a free transparent image viewer that allows mouse clicks to go through the image.
Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
PixelPerfect - Allows developers to put a semi-transparent image overlay over the top of the developed HTML and...
YakYak - Desktop client for Google Hangouts
Osiva - Osiva" is an acronym that stands for "Overly Simple Image Viewing
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).