I couldn't find a post and/or "sticky" that listed all of the known card gaffing resources like books, notes, videos, eBooks, downloads, etc...

Here are some of the ones I've seen and gathered along the way reading through posts here, but if others would like to share we can try to get a running list going.

Books/eBooks
Expert Card Technique
Encyclopedia of Card Tricks
Martini - Lickity Split
Craig Matsuoka - The Gaff Factory
Don England - Gaff to the Hilt


Video Resources
Martini - The Art of Card Splitting
Don England - Gaffed to the Hilt
Gary Plants - Gaff Cards
Blake Vogt - Splitting Sessions

For a good starter jig, James P. Riser offers an inexpensive blueprint -
http://jamesriser.com/Magic/CardTrimmers......ser.html

For the advanced gaffers (all I use anymore) there is Eoin O’Hare’s Devious Devices -
https://www.theperfectshuffle.com/

There are also several video download “how to’s” on flap cards
Vogt has one on his site
Alex De La Fuente - https://www.penguinmagic.com/s/Flap+card......nload%29
Hondo has some on ellusionist’s site