come when called (recall)

This costs $19.99 from the Amazing Dog Training Man (well, this is free)

What else is out there (preferably for free)?

ASPCA

Zak George (video)
Training Positive (video)
kikopup (video)
kikopup (adding distractions, video)
expertvillage (video)

wikihow
wikihow (5 steps with pictures)
petfinder
Perfect Paws
Ian Dunbar
The Humane Society
American Humane Association
QuickandDirtyTips
DogsNSW
Dog Owners Guide
WebMD
For Dummies (video)

OK, that's enough for now

[6/25/15] Eric Letendre (well, I guess he started off this post in the first place)
One more from Eric