Zoiper
Zoiper was formerly known as Idefisk for use on Asterizk and SIP-capable IP based Communications sytems and infrastructure. It has an easy intuitive user-friendly interface that allows changing of lines, has native conferencing capabilities and is capable of URL handling and outlook integration. This is just one of the many VoIp client software available in the booming Voip Market and is released in three versions, a free trial version (which has some limited features), a BIZ package which is suited for business applications and is the most functional of all the version releases, and an OEM version which is customized to a customer�s specific needs offering integration with other business applications.