2. is a that allows users to make voice calls software application over the internet. Calls to other users of the service and, in some countries, to free-of-charge numbers, are free, while calls to other land lines and mobile phones can be made for a fee.

3. Magic jack Magic Jack is a computer in combination with telephony service from the related YMAX Corporation, provides internet based telephone service to the U.S and Canada.

4. Google talk is a free Windows and web-based application for instant messages and voice over internet protocol.

5. Blogs maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse- chronological order. Blog can also be used as a verb, meaning to maintain or add content to a blog.

6. Shared calendars Organize your schedule and share events with friends with share calendar!

7. podcast A podcast is a series of digital media files, either audio or video, that is released episodically and downloaded through web syndication.

8. webcasts A webcast is a media file distributed over the Internet using streaming media technology. A webcast may either be distributed live or on demand.

9. twitter Twitter is a free social networking and micro- blogging service that enables its users to send and read messages known as tweets. Tweets are text-based posts of up to 140 characters displayed on the author's profile page and delivered to the author's subscribers who are known as followers.