If you want to use Annwvyn, the recommended way is to just install the SDK. If you want to build it from sources, you need the dependency package that you can download here. Extract it somewhere, run the “RUNME.bat” file
enclosed and you can clone the Git repository as a sub-folder of this one.
The dependency package contains various project with different free software licenses. Each of them has their respective copyright notice. The Oculus SDK is re-distributed in source and object code under the term of the OCULUS SDK LICENSE as specified here
Theses archives and installers are signed with the following GPG key : 2A06BCF3
If you want to check the signatures and checksups, go to the raw download directory, all the necessary files are here: http://annwvyn.org/dl
Once you have installed the Annwvyn SDK, you can go follow the quickstart guide on the wiki!