Alternatives to Kmess for all platforms with any license

Pidgin

Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks all at once. It has built-in...

Free Open Source Mac Windows Linux BSD PortableApps.com ... Xfce
Support for Multiple protocols Support for Multiple protocols Supports XMPP Extensible by Plugins/Extensions ... IRC Plugins Messaging Multiple languages Multiple Account support Multiple chat protocols Portable Video calling Voice Call Xmpp Add a feature

1478 Like
IM+

Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Google Talk, AIM, Jabber, ICQ, Facebook, MySpace and Twitter on ALL...

Freemium Web Windows Mobile Android iPhone Java Mobile ... S60 HP webOS Blackberry Android Tablet Windows Phone iPad Kindle Fire
Multiple Account support Support for Multiple protocols Add a feature

108 Like
Messenger for Desktop

A simple & beautiful app for Facebook Messenger. Chat without distractions on any Operating System.
- Bundleware
  Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/
Free Open Source Mac Windows Linux
Messaging Voice chat Add a feature

12 Like
Kopete

Kopete is an instant messenger supporting AIM, ICQ, Jabber, Gadu-Gadu, Novell GroupWise Messenger, and more. It is designed to be a flexible and extensible...

Free Open Source Mac Linux BSD
Xmpp Add a feature

71 Like
Instantbird

Instantbird is an instant messaging client based on Mozilla XULRunner and the open source library libpurple created by the software developers of...
- Discontinued
  Site last updated 2013. Site security certificate expired April 2017.
Free Open Source Mac Windows Linux PortableApps.com
IRC Multiple languages Support for Multiple protocols Portable ... Xmpp Add a feature

40 Like
Beagle IM

BeagleIM is a lightweight and powerful XMPP client developed by Tigase, Inc. It provides an easy way to start using the XMPP Protocol (formerly known as Jabber) if...

Free Open Source Mac
Desktop app Messaging Video calling Video chat ... Xmpp Add a feature

1 Like
Galaxium

Galaxium is an instant messenger application designed for the GNOME desktop. It will allow you to connect to MSN, Jabber, and IRC. You can communicate with your family...

Free Linux
IRC Xmpp Add a feature

7 Like
Centericq

Centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu and Jabber protocols.
- Discontinued
  The program is no longer updated. Last version, 4.21.0, released in September 2005, can be still downloaded from the official website.
Free Open Source Mac Windows Linux BSD
Built-in RSS reader Text-based Add a feature

1 Like