P

permutation

Static shuffling and static random permutations: shuffling of tuples and generating random permutation tuples

Lightweight cryptography

List shuffler and random integers: RANDOM.ORG-like utility webpages supporting 'better' randomness (http://qrng.anu.edu.au or bring-your-own entropy)

https://0joshuaolson1.github.io

Invertible transformations on permutation representations, including an RNG-free in-place Fisher-Yates-Knuth shuffle

https://www.npmjs.com/package/factoradic