Chat
- Miranda: sistema modulare. Supporta ICQ, MSN, Yahoo, IRC, Jabber. Discussione ufficiale
- Pidgin (ex Gaim): compatibile con AIM (Oscar e TOC), ICQ, MSN Messenger, Yahoo, IRC, Jabber, Gadu-Gadu e Zephyr
- aMSN: MSN Messenger clone
- Trillian: supporta AIM, ICQ, MSN, Yahoo.
- VIRC: client IRC
- Kvirc: client IRC