Similar to Windows_Messenger

Jami (software)

Kik Messenger

Kopete

Mattermost

Windows Live Messenger#Microsoft Messenger for Mac

Microsoft Teams

Miranda NG

Mumble (software)

Pidgin (software)

Skype

Skype for Business

Skype for Business Server

Telegram (software)

Telepathy (software)

Trillian (software)

Windows Live Web Messenger

MSN Messenger

Wire (software)

Xfire

Yahoo Messenger

Zimbra