The following is a list of instant messengers.

Mainstream

• AIM
• ICQ
• MSN Messenger
• QQ
• Yahoo! Messenger
• Windows Messenger

Third-party

Multi-protocol

• Adium
• Agile Messenger [1]
• aMSN
• Ayttm
• BitlBee
• BlowSearch Secure Messenger [2]
• Centericq
• Everybuddy [3]
• Fire
• Gaim
• iChat
• IM2
• Konnekt
• Kopete
• Milkbone
• Miranda IM
• naim
• ngIM Client [4]
• Odigo Messenger
• Proteus
• Qnext
• SIM
• Trillian

Single protocol

• Licq
• mICQ
• Trele Morele [5]

Jabber protocol

• Exodus
• Gabber
• JAJC
• Psi
• Tkabber

Proprietary protocol

• Akeni [6]
• BitWise [7]
• Gadu-Gadu
• Gossip [8]
• Instan-t [9]
• Lotus Sametime
• My Messenger [10]
• Omnipod [11]
• Skype
• Sonork [12]
• TiVi [13]
• Tlen

See also

• Comparison of instant messengers