A cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS.
Lets you send free messages as well as make free calls to other Viber users, on any device and network, in any country!
A messaging app with a focus on speed and security.
Quality voice communication via the Internet.
Connect with your favourite people.
All-in-one voice and text chat for gamers that’s free, secure, and works on both your desktop and phone.
Exchange free instant messages with friends whenever and wherever with one-on-one and group chats.
A chat program which lets you log in to accounts on multiple chat networks simultaneously.
Skype keeps the world talking. Call, message and share whatever you want for free.
An open source, peer to peer, LAN messenger.
An easy-to-use LAN messaging application for safe, secure and effective intra-office communication.
Secure and independent communication, connected via Matrix.
Communicate freely with people over the internet, with voice, video, and text instant messaging.
A free instant messaging application for communication over a local network.
All your chats in one app
Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
A fully-featured XMPP client.
A pop up style LAN Messenger.
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
An end-to-end encrypted messenger that minimises sensitive metadata, designed and built for people who want absolute privacy and freedom from any form of surveillance.
Chat with other Trillian users or those on Facebook, Google, AIM, ICQ, XMPP, Yahoo!, Twitter, and more.
An IRC client with multiserver support and a customizable interface.
A free messaging app for WhatsApp, Facebook Messenger, Telegram, Slack and more.
The secure Slack/WhatsApp alternative for organizations handling regulated/sensitive data.
Chat with other users in the same subnet.
An open source SoftPhone, Video Conferencing and Instant Messenger application over the Internet.