ShiftedSnow

Small mod that allows to place snow on some blocks.

• Places snow when you use Snow Layer item just as minecraft does.
• By default, supports stairs and walls (cobblestone fence).
• Can support slabs, enchanting table and also fences, plants, rails and some other blocks can sink in the snow. Disabled by default because of misleading way minecraft work with bounding boxes (hightlights boundary when you look at snow, but really breaks/uses a block behind).
• Should work with most of mods. 

 Page on minecraftforum.net