ZoIPer Free Softphone: IAX & SIP phone for Windows, Linux and Mac OS, Add multiple accounts.

Most of the VoIP companies provide SIP (Session Initiation Protocol) servers, which give you more flexibility to use the VoIP. There are lot of advantage, like you can use the service from SIP hardware phone, from your SIP enables mobile like NOKIA E61m E71 etc.XLite from Counterpath is a very popular SIP softphone, but the free versoin allow only one SIP account. Today will discuss about ZoIper