Some mods have singleplayer and multiplayer downloads.
I know but what i mean is i downloaded computercraft once on a regular server and everyone that joined needed to download the singleplayer version to so is there a way to make it so you dont have to do that?
Download Tekkit if you want computer craft and other mods for SMPEdit: They do it's called forge if I remember correctly but everyone still has to download and install forge.Edit2: but of course it only works for mods optimized for it.