Free Presentations in PowerPoint format

National Missing Children's Day Poster Contest - Entrants must be in 5th grade 

Free Contests For Kids

Kids Sweeps from Kids Turn Central

Harper Collins Childrens Books 

Free Contests For Adults

Win a Trip for 2
 (US Airways, this one is occasional, 
but I keep an eye out since it includes air, hotel) 

From Lifetime TV - Fun & Game Sweeps

Sony Pictures
(These change with featured movies. Check in to see what they have currently)

Rachael Ray Show - All kinds of giveaways. Free to enter!

Pillsbury Bake Off Contest

Betty Crocker Store Sweepstakes - Win $250, quick entry online

Sweepstakes, Contests and Giveaways - Goodhousekeeping.com

Travel Channel Travel Bug Sweepstakes
(new contest every month, extremely easy to enter)

Contests and Giveaways compiled by Parenting.com 

Contests worth entering
(compiled by About.com - cars, trips, little stuff, big stuff!)