Apps to Presence Status

QuteCom, formerly WengoPhone, was a free and open-source VoIP client supporting the SIP protocol. It enabled users to make voice and video calls, send instant messages, and connect with contacts across various networks, including Google Talk.

Spark is a free, open-source instant messaging client optimized for businesses and organizations. It integrates seamlessly with Openfire servers and supports a wide range of features including group chat, file transfers, and screen sharing, making it a versatile communication tool.

Nimbuzz is a comprehensive cross-platform communication application that provides free instant messaging, voice calls, and social networking features. It connects users across various devices and platforms, enabling communication with friends and family globally.