College lectures

http://www.productivity501.com/105-free-college-lectures/830/

IM + Email + Social Networks

http://www.digsby.com/

social media aggregator

http://www.profilactic.com/

Discover what your friends are sharing

http://friendfeed.com/

Excellent File Recovery Tool

http://www.recuva.com/

Reviews of Web Based Applications

http://www.appappeal.com/

Social media monitoring, buzz tracking, brand measurement and blog trend search

http://www.trendpedia.com/

generic player, capable of playing all formats

http://www.kmplayer.com/forums/index.php

Read books by email and RSS

http://www.dailylit.com/

web-based project management tool

http://www.5pmweb.com/

Share Live PowerPoint Presentations Online

http://www.slideboom.com/

Search for books, music, videos, articles and more in libraries near you

http://www.worldcat.org/

on-line book cataloging application

http://www.librarything.com/