Viber Free Messenger and Phone Calls.

CSipSimple is a Voice over Internet Protocol (VoIP) application for Google Android operating system using the Session Initiation Protocol (SIP).

MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.

Eyenewton is a platform to build and publish user feedback widgets on your website.

Voxeet is VoIP web conferencing software that uses 3D high definition voice technology to produce immersive sound.

Telephone allows you to make phone calls over the Internet or your company’s network.

Bleep is a fun and easy instant messaging app that is completely private.