Including GoodbyeDPI, bypassing some DPI-based censorship, and Super-UEFIinSecureBoot-Disk, allowing to boot things when secure boot is enabled. The interesting thing is that he recently published some work [2] breaking UEFI secure boot (not on github, but on zeronet), basically undermining Microsoft, current owner of Github and big pusher of UEFI.

His twitter account confirming that: twitter.com/ValdikSS

[1] https://github.com/ValdikSS

[2] https://habr.com/en/post/446238/