Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
Icon Slate - Icon Slate lets you easily compose, import and export desktop icons in many formats.
tSIP - tomeko.net/software: SIP client for Windows.
Icono Maker - Icono Maker is an icon maker for Windows.