PaperlessNgx makes scanned documents searchable. Its great!
For those who don’t know: Eternity (for Lemmy) is a fork of Infinity (for Reddit).
Don’t hate me bro :)
Cyperchef might not exactly what you are looking for, but it is selfhosted and has some conversion functions.
You can search for communities with https://browse.feddit.de/ .
For Rimworld I found: https://lemmy.world/c/rimworld