bit-hacks
There are 2 repositories under bit-hacks topic.
frederik-hoeft/branchless-cheat-sheet
A collection of copy pasta branch-less and/or high-performance bit hacks because I always find myself writing them from scratch when I need them. Maybe other people find them useful too...
Szhenger/scramble
This is Scramble, a command-line program written in C that encrypts files using inversion, reversal, hashing, or splicing algorithms.