I made this program for Pico8 a while back. If you arent familiar, the code is embedded in the image. Just grab a pico8 player and load the image.
Contains a dice roller, simple oracle, hex crawl terrain generator. (One hex at a time for solo crawling), dungeon room generator, pc stat generator, and a Norse rune picker for story telling purposes.
Pico-8 or TIC-80 would be such a good platform for that since their so multiplatform and easy to work with.