Expertvillage.com: Worlds Largest How-To Video Site
Odeo.com: Millions of MP3s and 1000's of audio channels—podcasts, music, and more.
Ecofoot.org: Measure your Eco-Footprint
Fafsa4caster.ed.gov: Federal Financial Aid Calculator
Pollingreport.com: An independent, nonpartisan resource on trends in American public opinion.
Linkedin.com: A social network for business professionals and career-minded folks.
Wetpaint.com: With Wetpaint you can start, share, and grow a wiki with anyone about anything.
And Many More...