Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.

WhatsApp Messenger is an instant messaging platform owned by Facebook.

Linphone is a free voice over IP (VoIP) service and SIP client.

WeChat is a social media with instant messaging, commerce and payment services application.

Threema is an encrypted instant messaging application for iOS, Android and Windows Phone.

MeetMe (formerly myYearbook) is a social networking service.

Tencent QQ (QQ) is an instant messaging software service.

Telegram is a free cloud-based instant messaging platform.

IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc.

ICQ is an open source instant messaging software.

Smartsupp is a free live chat for your website.

csupport Live Chat and Customer Support service software.

Sicher is a freeware instant messaging application for iOS, Android, and Windows Phone. Sicher allows users to exchange end-to-end encrypted text messages, me…