
Photo credit: Sachin Ghodke
- Clavardon: Browse pages with other people in real-time while chatting
- Wiki-Site: Create free wikis for your projects without registering
- Fotoll: Build online polls and gather immediate feedback on your doubts
- Joodo: Communicate with messages, chat in real-time, and share files and folders
- Clavardon

Clavardon is a co-browsing service that allows you to browse pages with other people simultaneously. After you enter a URL, you can start inviting your friends and, while you chat with them, they will be able to see your movements on any site: you can scroll, highlight any part of text and input any other URL and be sure that people will look at the same things as you do. Free to use for up to 100 sessions per month.
http://www.clavardon.com/
- Wiki-Site

Wiki-Site is a service that allows you to create free wikis for your projects. Provide a name, URL, administrator password and you're done: your new wiki, which will look exactly like a Wikipedia page, will be accessible to anyone of your colleagues, who will be able to edit and create pages, have discussions and more. Free to use, no registration is needed.
http://www.wiki-site.com/
- Fotoll

Fotoll is a polling system that you can use to ask opinions and gather immediate feedback. Here's how it works: just register for free, type a question (for example which service is better than the other) and upload the images of the candidates. People can then just click on their favorite one, and also type a comment explaining their vote. Free to use, registration needed.
http://fotoll.com/
- Joodo

Joodo is a file sharing P2P software, still in alpha, that you can use to communicate with your friends. After you install it and register, you can invite your friends and add them to your contact list: you can then share any folder on your PC with different levels of access, create torrent files to share, send messages, text-chat, and even monitor your friends' activities. The service is free to download and use.
http://www.joodo.com/