Since 2011 and Gokaiger, fans have being using the Ranger Keys as templates for much creativity from Super Sentai, Kamen Rider and too various various different characters (not even just tokusatsu but also anime, superheroes and others).
AbareMax, DekaRed Swat Mode, Legend Red, Super Geki Red, Hyper Go-On Red, Super Shinken Red, and Super Gosei Red.
Deka Bright (Nova Ranger), Ankh (Kamen Rider OOO), and Deka Gold
Shizuka no Wind, Loki (Zenaku), Furabijou (Marah), Agent Abrella (Broodwing), and Barizorg
Hulk, Spider-Man, Captain America, Iron Man, Thor
The pics from above are from: http://thefans.kr/technote7/board.php?board=galspcfilm&page=1&command=body&no=1571&PHPSESSID=b48f87ad8b54353265e66897616ad39f
Here we got Gavan Bootleg, Kamen Rider Fourze Fire State, Meteor, Fourze, Skull, Gavan, Kamen Rider Double and Fourze Elec State.
W and Skull
I forget where these are from.
Related: http://henshingrid.blogspot.com/2012/04/ei-hamuras-home-made-ranger-keys.html | http://henshingrid.blogspot.com/2012/06/why-center-rangers-were-not-included-in.html
Gokai Silver Gold Mode
Green Flash, Blue Mask
Red Mask to Blue Mask
The last Legends: VulEagle, ChangeGriffin, Green Flash, Blue Mask, and Five Yellow
DenjiBlue, GingaPink, TimeYellow, GingaGreen and Black Condor; these five are now Gashapon Legend Ranger Keys.
Mickey Mouse, Hello Kitty, etc:
This girl has an awesome custom but didn't put a clear picture.
Here are Ninjaman, Gunmajin and Datas:
Gunmajin (Auric the Conqueror)
Amazing, great work.