A third-party supplement for The Black Hack, which adds versions of the AD&D 1st Edition classes missing from the original rules: acrobat (thief-acrobat), assassin, barbarian, bard, cabalist (illusionist), cavalier, druid, monk, paladin, and ranger. These are all pretty solid conversions, although some class choices (acrobat, assassin, cavalier, druid, monk, paladin, ranger) are more interesting than others (barbarian, bard, cabalist).

There is one hiccup with the cavalier (some text copied from the paladin and not altered), and the formatting is slightly off from the original Black Hack, but these aren't serious issues.

Good ideas better suited to a blog post than a product for sale