Photo credit: Petrol

1. Voixio: Free Flash-based application allows you to have free video conferences and calls
2. Dropbox: Free software lets you create a public folder for you to share any file online
3. BumpIn: Browser plug-in for chatting with people on your same webpage
4. Wauwee: Mobile application enables you to chat and share pictures from any phone or PC

1. Voixio
   
   Voixio is a Flash application that allows to have free video/audio conferences, text-chat, and call landlines and mobile phones for free, or at very cheap rates. After you register you can start adding contacts, and create video conferences with up to 4 people in which you can see each other, talk, and instant message. You can also call normal phones for free, after watching a short video advertising clip, or at very low rates. Free.
   http://www.voixio.com/





2. Dropbox
   
   Dropbox is a free software for Windows and Mac that creates a folder on your PC, where you can put any file that will automatically be uploaded and synchronized online. You can then access it through a web version of Dropbox, or from another PC where you installed the software. Any file or folder can also be shared with anyone who has an email address, or you can simply assign a public URL to each one of your files to easily share them. Free beta.
   http://www.getdropbox.com/





3. BumpIn
   
   BumpIn is a browser add on that allows you to chat with people browsing the same page as you. You can have private chats, or shout to everyone visiting that particular page. You can also use the web-based version, by clicking on BumpinBrowser on the homepage, and start chatting with people without installing any software on you machine. Free to use.
   http://site.bumpin.com/





4. Wauwee
   
   Wauwee is a free service that anyone can use to chat and share pictures from her PC or Internet enabled phone. All you need to do is register to the service, and you can then start text-chatting with all of your friends, and share pictures in real-time with them. It is free to use after a simple and immediate registration.
   http://www.wauwee.com/