[2017/09/22]

-SAFE FIRMWARES-
3DS: 11.3 (11.5 via system transfer or magnethax)
Switch: 3.0.0
Wii U: 5.5.2
Vita: 3.60
PS4: 4.05 (Userland)
PS3: 3.55

-GUIDES-
3DS: https://pastebin.com/TQwDsWh9
b9s + CFW: https://3ds-guide.b4k.co/

Wii U: https://pastebin.com/8u0WAyJC

Wii: https://sites.google.com/site/completesg/hacking-guide

Vita: https://pastebin.com/6DjeR08L