Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android. Developed by Savoir-faire Linux
License: Open Source
Ring is primarily focused on secure communications with a strong emphasis on privacy and anonymity, making it ideal for users who prioritize secure messaging. Pidgin is a versatile messaging client supporting multiple protocols, great for users who require a customizable and comprehensive messaging solution.