Since this article was first published, the business of children's educational software has changed drastically. Overall, the number of demos has decreased. I am disappointed in this trend because it helps to try a program out on your child before you spend your money.
AMATH-PreAlgebra
Free demo for pre-algebra learning software.
Big Math Attack! - Educational Software
Download free demo from Softword Technology.
Broderbund Demos
Free demo downloads for parents and kids.
Children's Chore Chart
Shareware download from TKO Software.
Colorful Mathematics/Games
Free downloads of elementary mathematics software.
Creative Writer 2 Trial Version
Free download from Microsoft Kids.
DareWare's FREE Educational and Multimedia Software
Free educational software downloads on various subjects.
Freeware Games and Activities: The Family Games Free Stuff Page
Free downloads from Aha Software.
Greetings Software
Free full version from Parsons Technology.
KinderActive Multi-Media
Fill out the marketing survey to receive a free kids' CD-ROM.
Microsoft Kids Free Game Downloads
Magic School Bus games.
Mindplay
Free educational software demos for elementary ages.
Special Offers from Edmark
Download Jungle Chess and the Geoboard.
Screen-Savers, Backgrounds, and Other Computer Stuff
Berenstein Bears Downloadables
A screen saver and mouse cursors for the kids.
Broderbund Software Free Screen Savers
A good selection here.
DK Publishing -- My First World Explorer
Wallpaper, icons, and other graphic goodies from the software program.
Garfield Screensavers
For Win and Mac from Garfield Online.
Garfield Wallpaper & Icons
For Win and Mac from Garfield Online.
DK Publishing - Dinosaur Downloads
Invitations, envelopes, door hangars, wallpaper, labels, and postcards.