Photo credit: Rudat

1. Humyo: Get 30GB of free storage space to upload and share any type of file
2. Say2GO: Chat and send voice messages to all of your friends
3. Chatroll: Join or create chat groups and talk about anything you want
4. Ayttm: Free multi-protocol instant messaging client for Windows and Linux

1. Humyo
   
   Humyo is a free file hosting/sharing solution that anyone can use to upload and share files online. After you register to the service, you will be give 30GB for you to upload all of your files online: you can the access from any computer, share them with everyone who has an email address, and also publish multimedia files on your web page. The service is completely free to use or costs $45.99 per year for a 100GB account.
   http://www.humyo.com/





2. Say2GO
   
   Say2GO is an online collaboration software that you can use to chat and send voice messages to your friends. After you install it and create a free account, you can add all of your friends by name or email. You can then start chatting with them, and record voice messages that can be also recognized and converted to text by your computer, so that you won't have to type anymore. Free to download and use.
   http://www.say2go.com/





3. Chatroll
   
   Chatroll is an easy to use site site that allows you to join interest group chats or make your own interest group, and chat with others. You don't need to sign up or register to Chatroll to join or make a group and start chatting. Each chat has a specific URL that you can cut and paste anywhere and invite everyone to join your conversation. Chatroll is completely web-based and free to use.
   http://www.chatroll.com/





4. Ayttm
   
   Ayttm is a free instant messaging client for Windows and Linux that currently handles Yahoo!, MSN, Jabber, IRC, AIM and ICQ networks. None of the original features is turned off: you can in fact have group conversations, status indicators, sounds, chat history, offline messages and file sharing. The software is free to download and use.
   http://ayttm.sourceforge.net/