CSipSimple is a Voice over Internet Protocol (VoIP) application for Google Android operating system using the Session Initiation Protocol (SIP). Developed by Regis Montoya
License: Open Source
Fring is a user-friendly VoIP application suitable for casual users, focusing on ease of use and basic functionality. In contrast, CSipSimple is an open-source, feature-rich SIP client aimed at advanced users who need customization and support for a wide range of codecs.