Communications

Slack

More than just a messenger service, ideal for workplace teams.

Free

Join.me

A useful tool for up to 10 people to hold a meeting no matter where in the world you are.

Free Trial

Trillian

A useful service to place all your instant messaging services in to one tool bar.

Free

Nimbuzz

A new and intriguing messenger app and chat service for smart phones and PC

Free

Mumble

A voice over IP client primarily used by gamers for in game communication.

Free

ICQ

A popular instant messaging application that has been around since 1996.

Free

Malden

See your friends' Skype status in your taskbar using Malden.

Free

Pidgin

Pidgin is a multi platform IM client that allows you to instant message all of your friends and co-workers from one simple application.

Free (GPL)

Tango

Bring the mobile Tango experience to your Windows desktop.

Free

Seaside

Seaside allows you to be logged in to multiple Skype accounts simultaneously.

Free

Yahoo Messenger

Chat with all of your friends and family with Yahoo Messenger.

Free

Clicks and Whistles

A fast and secure IRC client for your PC.

Free

Facebook Messenger

Bring your Facebook messages and notifications to your desktop.

Free