Freemium

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

Trillian

Freemium

Trillian is a proprietary multiprotocol instant messaging application.

Jitsi

Open Source

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Miranda IM

Open Source

Miranda IM is an open source multiprotocol instant messaging application, designed for Microsoft Windows.

IM+

Freemium

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

Wire

Free

Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…

Miranda NG

Open Source

Miranda NG is a successor of Miranda IM, a popular multi-protocol instant messaging client for Windows.

Voxeet

Free

Voxeet is VoIP web conferencing software that uses 3D high definition voice technology to produce immersive sound.

Tango

Freemium

Tango is the messaging app with the best video calling. All messages and calls are free.

Talkatone

Freemium

Talkatone is a free calling app.

YakYak

Open Source

YakYak is a desktop chat client for Google Hangouts.

Hangouts

Free

Hangouts is an instant messaging software developed by Google.

Viber

Freemium

Viber Free Messenger and Phone Calls.

Digsby

Open Source

Digsby provides you with IM, email and Social networks in one easy to use application.

Facebook Messenger

Free

Facebook Messenger is the official Facebook app that lets you have text conversations with all of your friends on the popular social network.

Linphone

Open Source

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

FaceTime

Freemium

FaceTime is a proprietary videotelephony product developed by Apple Inc. FaceTime Audio is an audio-only version.

iMessage

Free

iMessage is an instant messaging service.

CSipSimple

Open Source

CSipSimple is a Voice over Internet Protocol (VoIP) application for Google Android operating system using the Session Initiation Protocol (SIP).

BlackBerry Messenger

Freemium

BlackBerry Messenger, also known as BBM is an instant messenger and videotelephony application included on BlackBerry devices that allows messaging and voice …