Tiramisu is a homebrew environment for the Wii U. This is an alternative to the Haxch Wii U Hack, with some extra features.
The advantage of Tiramisu is that no DS VC game needs to be purchased to set it up, so it will be possible to hack a Wii U even if these are no longer any exploitable DS games available on the Eshop.
In addition you can take advantage of other interesting projects such as Bloopair, a tool that allows connecting controllers from other consoles like native Wii U Pro Controllers on the Wii U.
- CFW based on mocha with slighty more features
- Homebrew launcher injected into Mii Maker
- Autoboot Menu based on CBHC
- Full quick boot menu support of the Gamepad
In summery the TLDR is this is a better way to make use of Homebrew / CFW on the Wii U, that also happens to be totally free.
To get setup with Tiramisu visit the Wii U hacks guide: https://wiiu.hacks.guide/#/introduction - this guide will take you though everything required from start to finish to get things working.
Thanks to Digiex member @AlamosIT for the heads up on this release.