eyeBeam Audio-only [MAC OS X]
eyeBeam Audio-only [Windows]
The long awaited
Introducing Xten's new Video SIP Softphone - eyeBeam v1.1
X-PRO Encrypted for Windows
X-PRO for MAC OS X - Feature-rich SIP Softphone
Xten's SIP softphone for Pocket PC devices.
X-Cipher Secure Voice Service provides secure PC to PC voice communications and also acts like SIP softphone.