Thunderbird is a desktop mail client. It's a companion product to Mozilla Firefox. Besides standard email, it supports newsgroups, feed reading, and chat protocols (XMPP, IRC and Twitter), all with multiple identities or accounts. Through Mozilla Lighning or other plugins it's extensible into a full personal information manager. Out of the box it supports SMTP, POP3, IMAP, SSL/TLS, S/MIME, LDAP, RSS/Atom, and searching, filtering or grouping, labels, virtual folders, and comes with a spam filter
Messenger GTK is a convergent GTK messaging application using the GNUnet Messenger service. The goal is to provide private and secure communication between any group of devices.
Pidgin is a widely-used and featureful instant messenger and chat client. It supports AIM, Bonjour, Gadu-Gadu, Google Talk, Groupwise, ICQ, IRC, MSN, MXit, GroupWise, SILC, SIMPLE, Sametime, XMPP (Jabber), Yahoo!, Zephy. It provides friend lists across chat networks, file transfers, avatars, custom smileys, typing status display, away messages, and many more features (encryption, audio alerts, LED notification, IRC scripting, SMS gateways, sessions, auto-replys) and IM services (Tor, Twitter, Wh
Friend OS leverages the computing power of the Internet to offer many of the features and functionalities of Chrome OS, Windows, Linux, Android, macOS or iOS, without the need to choose a specific hardware platform or proprietary software package. If you have a device that can run a web browser, you can use Friend OS.
BeeBEEP is a secure networking chat. It allows simple chat-style instant messaging, group chats, friend lists, and exchanging files. It works in any intranet environment, or through public networks.
WeeChat is a light-weight and fast cross-platform chat client. It primarily supports IRC and runs on the console, albeit there are graphical frontends (HTML5, JavaScript, Emacs, Android). It supports IPv6, Socks5, SASL, SSL certificates and SSH, can function as IRC proxy, spell checking, 256 colors. And it's highly extensible via Python, Lua, TCL, Guile, Ruby and Perl scripts in addition to C plugins. There are extensions for Jabber/XMPP or Twitter for instance.
Converse.js is an instant messaging client for websites. It provides an entirely browser-based Jabber/XMPP interface, and can connect to any XMPP public server. Converse implementes single and multiuser chats, invitations, service discovery, direct registration, contact lists, roosters and vCard exchange, status changes and messages, typing and state notification, and OTR encryption.
Ricochet is a peer-to-peer, anonymous and secure instant messaging system utilizing Tor. It allows chatting with anyone without exposing an identity or IP address. It does not reveal any meta data, contacts, as it does not rely on central servers.
GoldBug is a secure communication suite offering an E-Mail-Client, an Instant Chat Messenger, Filetransfer and a P2P Websearch within decentralized URL-Databases. Every of your transfers is multi-encrypted by default. ● English User Manual: https://en.wikibooks.org/wiki/Goldbug ● Deutsches Benutzer-Handbuch: https://de.wikibooks.org/wiki/Goldbug ● http://marjorie-wiki.de/wiki/GoldBug_(Instant_Messenger%29 COMPILE from source: https://github.com/textbrowser/spot-on
Chatty is a chat client for Twitch as alternative to the webchat. It avoids the complexity of IRC but still provides many Twitch specific features, such as emoticons, user icons, nick colors, OAuth connection, admin settings, stream infos and notifications, keyword highlighting, a chatlog, customizable fonts and colors.
BitchX is an IRC client for Unixish systems, derived from ircII with influences from EPIC. It has built-in ANSI color support, not as pretty as Xchat but still easy to use; includes useful command aliases to reduce typing, notify, protection, bots, mass commands and channel tools, DCC and CDCC offering, and a link looker. It includes extended scripting capabilities, due to its large user base and lengthy development time. The included screen functionality allows to detach and reconnect to IRC se
BitlBee allows users to talk to people on the major instant messaging and microblogging networks (including MSN, Google Talk, AIM, and Twitter) from within any IRC client by emulating an IRC server. Virtual channels are created with all of the user's contacts in them, who can be talked to in the channel or in a query. Also, one can participate in group chats and chat rooms like they were normal IRC channels.
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