Mac OS X Softwares to Support for Multiple protocols

Textual is a premium Internet Relay Chat (IRC) client exclusively designed for macOS. It provides a user-friendly interface, extensive customization options through themes and plugins, and robust support for common IRC features, aiming to offer a modern and polished chat experience.

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.

WeeChat is a highly customizable, free and open-source command-line based chat client. Designed for efficiency and portability, it supports multiple protocols including IRC and XMPP, making it a versatile tool for connecting to various networks.

qutIM is a free and open-source, multi-protocol instant messenger designed for connecting to various networks including ICQ, Jabber, Mail.Ru, IRC, and VKontakte. It offers a unified interface for managing multiple accounts and conversations.

SoftEther VPN is a free and open-source, cross-platform, multi-protocol VPN software solution. It functions as both a VPN client and server, offering high compatibility and advanced features for building secure and flexible VPN connections.

aMule is a free and open-source peer-to-peer file sharing application designed for flexibility and decentralization. Supporting the robust eDonkey and Kad networks, it offers a secure and privacy-focused approach to finding and sharing digital content across multiple platforms.

Kopete is a versatile, free and open-source instant messaging client designed initially for the KDE Plasma desktop. It distinguishes itself by supporting a multitude of protocols, allowing users to connect to various chat networks from a single application.

FrostWire is a powerful, free, and open-source BitTorrent client with integrated search, media player, and support for various file-sharing protocols. It simplifies downloading and sharing large files, including music, videos, and software, while offering features like YouTube and Soundcloud downloading.

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.

KVIrc is a versatile and highly customizable graphical IRC client available for Linux, Unix, macOS, and Windows. It is designed to cater to both seasoned IRC users seeking advanced control and newcomers looking for a user-friendly interface to connect to various IRC networks.