iPhone Apps to Support for Multiple protocols

Zoiper is a versatile and easy-to-use SIP softphone designed for clear voice and video communications. It offers excellent audio quality, robust security features, and seamless integration with various communication protocols, making it ideal for personal and business use.

Fring was a pioneering mobile application that unified communication across popular platforms like Skype, MSN Messenger, ICQ, and Google Talk directly from your iPhone, offering voice calls, video calls, and messaging.

IM+ is a versatile instant messaging application designed to unify communication across multiple platforms. It supports a wide array of popular services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber, and even Slack. IM+ simplifies staying connected with friends, family, and colleagues, offering a centralized hub for all your chat needs.

OpenSSH is the leading open-source implementation of the Secure Shell (SSH) protocol, providing a secure and reliable method for remote access, file transfer, and network tunneling. It encrypts all communications, protecting against eavesdropping and connection hijacking.

Trillian is a versatile, multi-protocol instant messaging client that unifies various communication platforms like IRC, XMPP, and more into a single, user-friendly interface. It's designed for both personal and team collaboration, offering features like encrypted chats, group collaboration tools, and extensive customization options.