1. Communication software

  2. Instant Messaging

ICQ 10.0.38094.0

Version of the popular open-source instant messaging software

Publisher: Icq  Rating: 7.6 out of 10 (98 votes)

Skype Lite Client 1.1.6

Scaled-down version of the well-known VoIP tool that keeps people connected

Publisher: Olcinium 

Slack 3.0.1.0

Reorganize your day, and be more productive

Publisher: Slack Technologies Inc.  Rating: 9.0 out of 10 (1 votes)

QQ 1.0.198.0

A faster program used for chatting online

Publisher: Tencent  Rating: 5.3 out of 10 (16 votes)

Lync for Windows 8 16.0.1929.1162

Web conferencing application that contains many useful features

Publisher: Microsoft Corporation 

MSN Messenger for Windows XP 7.5.0322

One of the original text messaging interfaces that still looks great

Publisher: Microsoft  Rating: 6.4 out of 10 (876 votes)

LINE for Windows 10 4.2.1

Well-rounded VoIP software that enables free communication using any modern device

Publisher: LINE Corporation  Rating: 7.3 out of 10 (251 votes)

Exodus 0.10.0.0

A free instant messaging and chat program for Windows

Publisher: Exodus  Rating: 6.0 out of 10 (12 votes)

Windows Live Messenger 16.4.3522

An instant message program for Windows users

Publisher: Microsoft  Rating: 6.6 out of 10 (4859 votes)