Ari's Yahoo Client
Ari's Yahoo Client is a simple client for Yahoo! Messenger that does not require a window system.
Curphoo is a Yahoo chat client that features automagic tab curphoo command completion, automagic tab chatter name completion and fast private messages.
Cursed Chat is a curses based client for Yahoo Chat.
GTKYahoo is a GPL'd GTK+ based yahoo pager client for unix.
Gyach is a GTK+ based Yahoo! Chat client. It features a chatter userlist window, ignore list, scrollback buffer and PMs.
GyachI is an improved version of GyachE, a feature-rich client for the yahoo instant messaging protocol. It has rudimentary support for v4l2-webcams, support for v411-devices, and can resize webcam pictures.
Kyim is an instant messenger client compatible with Yahoo Networks.
Pyhoo is a script that converts Yahoo IM logs in .dat files into plain text.
Yahoo! Messenger is a free messaging service that allows you to communicate instantly with friends, family, colleagues, and others. Find out when your friends are online and send them instant messages. Messenger alerts you instantly when you have new mail in your Yahoo! Mail.