In a world where free information is under pressure and the eye of surveillance is everywhere, Telegram Messenger is an instant messaging app that keeps users hidden. Social, gadget savvy people

Tettra is a company wiki that helps Slack teams manage and share organizational knowledge.

TiddlyWiki is a program that allows you to capture the thoughts and ideas that you have when you don't have a way to remember all the details.

Trillian has taken its experience working with instant messaging services and leveraged it to create a secure business-oriented communications platform.

Team Communication for your 'extended' team across company boundaries - clients, partners, vendors etc.

24 Apr 2008 ... Before XWiki 6.4RC1, this was not possible and modifying the content of the home page (i.e. Main.WebHome) was the only solution to work around this limitation.

Zarafa software is an open source email and collaborative software that features calendaring, is compatible with mobile devices, and ensures task and contact management. Zarafa is a webmail

Zoho Connect is a team collaboration software that helps teams ideate, discuss, and work together, from any place, on any device.