Zoiper 5 is a softphone compatible with Windows, with automated wizards for audio, video and accounts.
Drag and drop calls and contacts to transfer calls or combine them into a conference. Can look and pull contacts from various sources and display these in a combined Contacts list for easy access. Zoiper's flexible settings options allows you to choose which contact sources to see in your Contacts list.
Chat with friends and enjoy stealth settings, video calls, PC calls.
Configure SIP accounts, perform VoIP phone calls or initiate audio conferences.
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CALL SHARP works like a telephone to let you make calls through your computer
It enables you to make cheap international calls from your desktop computer.