Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
Tabbles - Tabbles use tags to organize and find files along with your colleagues.
tSIP - tomeko.net/software: SIP client for Windows.
allTags - allTags is a free, tag based file management application.