Skype

Skype is software for calling other people on their computers or phones. Download Skype and start calling for free all over the world.
The calls have excellent sound quality and are highly secure with end-to-end encryption. You don't even need to configure your firewall or router or any other networking gear.
Additionally it doesn't just work on Windows. Skype is also for Mac OS X, Linux and PDAs using Pocket PC, with a native look and feel for each platform. Talking, sending instant messages or even file transfers work between different platforms like a charm.

• Skype calling - Skype has all the features of an ordinary phone so it's even easier to manage your calls.
• Video calling - see who you are talking to at the same time as speaking to them.
• Add Skype and SkypeOut contacts - Add contacts who use Skype and those who use ordinary phones so you can call more people.
• Organising groups - group contacts under certain names and share them with your contacts so they can talk to them too.
• Basic chat and emoticons - when it's not convenient to call, chat or Instant Message (IM) your contacts.
• Group chat - for when it's easier to chat or Instant Message (IM) all your friends at once.
• Profile settings - change how you appear to the world and let people know a bit about you.
• Conference calling - talk to more than one friend at a time.
• Import contacts - search your address book to find friends and family that already have a Skype name and start calling them for free.
• View Outlook contacts - view and call your Microsoft Outlook® contacts quickly and directly from your Skype contact list.
• Quickfilter and Speed-Dial - find Skype contacts, recent chats and SkypeOut contacts quickly and easily, then enter their Skype name to call them back quickly.

source:http://filehippo.com/

Yahoo! Messenger

Keep friends at your fingertips with the new Yahoo! Messenger:

• Easier ways to stay up to date - See more updates from your friends in the detailed Messenger list
• Show off your status - Easily add links and emoticons to your status messages
• Watch videos together - Share videos from popular sites and watch them with friends right in your IM window

Other features include:

1. Instant message with one friend, or conference in a bunch
2. Send text messages (SMS) to friends' mobile phones
3. Join a chat room to meet new friends while you discuss your favorite topics
4. Make free PC-to-PC calls and PC-to-phone calls for as low as 1¢ a minute (plus free voicemail!)
5. Use the built-in media player to watch web videos and view photos with friends
6. Show your style with emoticons, Avatars, audibles and IMVironments
7. Share securely with automatic file scanning for users of Norton AntiVirus or Internet Security 2007/2008

Foxit Reader to read PDF file format

Foxit Reader is a free PDF document viewer, with incredible small size, breezing-fast launch speed and rich feature set. Its core function is compatible with PDF Standard 1.7.

• Incredibly small: The download size of Foxit Reader is just a fraction of Acrobat Reader 20 M size.
• Breezing-fast: When you run Foxit Reader, it launches instantly without any delay. You are not forced to view an annoying splash window displaying company logo, author names, etc.
• Annotation tool: Have you ever wished to annotate (or comment on) a PDF document when you are reading it? Foxit Reader allows you to draw graphics, highlight text, type text and make notes on a PDF document and then print out or save the annotated document.
• Text converter: You may convert the whole PDF document into a simple text file.
• High security and privacy: Foxit Reader highly respects the security and privacy of users and will never connect to the Internet without users' permission. While other PDF readers often silently connect to the Internet in the background. Foxit PDF Reader does not contain any spyware.