Photo credit: Dmitry Kutlayev

1. ADrive: File hosting service gives you 50 GB for your files, and lets you share them with anyone
2. SnapYap: One-to-one free video conferencing room allows you to have free video-audio calls with your friends
3. MyMapChat: Google-maps based web-site lets you chat with people and groups on a world map
4. Palringo: Multi-client mobile chat application enables you to chat, share files, and talk from your mobile device

1. ADrive
   
   ADrive is a new web-base file hosting solution which gives you 50 GB of online free storage for free. After you create an account, you are able to upload all of your files online through a web-upload, but a new uploading solution will be available soon. You can use ADrive as your online backup hard-drive, but you can click the button "Share", and make your files public so that anyone can access them anytime. Completely web-based and free.
   http://www.adrive.com/





2. SnapYap
   
   SnapYap is a free online voice conferencing tool, that anyone can use to have free one-to-one video-audio calls. Filling up a simple registration form, enables you to create your personal video conference room, in which you can invite anyone to join you: if the have a SnapYap account, you just need to insert their username, else just provide their email address and they will be sent an email with instructions to enter the room. Free to use.
   http://www.snapyap.com/





3. MyMapChat
   
   MyMapChat is a map-based site, based on Google-maps' interface, in which you can send messages to anyone in the world. MyMapChat has a very easy-to-use interface, made of a map, on which you can post a message of your own for anyone else to see, follow other users' messages, send private messages with attached pictures, and form online groups to easily collaborate with your team. It is completely free to use.
   http://www.mymapchat.com/





4. Palringo
   
   Palringois a freeware application that brings multi-client chat to your Windows Mobile device or Symbian smartphone. It fully supports MSN, Yahoo, AIM, GTalk, Jabber, and ICQ, in all of their features starting from voice-chat, emoticons, customizable-status, and more. To download the software, it requires sign up, and you need to be sure your phone runs Windows Mobile 2003(or up) or Symbian. Free.
   http://www.palringo.com/