I believe this to be the most complete list of Cinderella adaptations on the internet. I add to it frequently, it's something of a fascination for me.

I'm counting
-straight-up adaptations
-modern or creative adaptations with two or more elements (for instance a riches to rags, rags to riches, or most traditionally a riches to rags to riches arc plus a 'fairy' godmother, a 'ball' equivalent, having to leave before the clock strikes 12, a 'shoe' equivalent etc)
-operas, ballets, pantos
-artworks incorporating the imagery of Cinderella
-tenuous porns (I think it's funny and I refuse to look too hard into them)
-non-sequels where Cinderella is a character or canon
-films that feature multiple stories, one of which is Cinderella

not counting
-sequels which don't follow the Cinderella arc
-movies with Cinderella in their name only ('Cinderella Jones' or 'Cinderella Man' for ex) - these are hard to weed out
-movies that only have a 'rags to riches' arc (often described as 'a Cinderella story') with no other elements - these are often also hard to weed out!