Gizmo5

Gizmo5 is a free software and VoIP service of the same name.

Features

• Free voicemail.
• Text messaging in chat mode.
• Free in-network calls for Gizmo5 users.
• Simultaneous registration in Gizmo5 network and other networks: for example, to the company's internal SIP IP-PBX.
• Ability to communicate (both voice calls and text messages) with Skype participants through OpenSky.
• The text messaging module uses the XMPP protocol.
• Support for communicating with other XMPP networks.
• Support for shared XMPP chat rooms.