I've uploaded the TilesetMaker into the files section.
It's now clumsely called 'TilesetMaker.zip.zip'.
Anyhoo, get it
here.
What it does:
-Import tiles from screenshots in a userfriendly way.
-Edit existing tilesets. Like rearranging positions of tiles, inserting and deleting tiles. Well, that's about it.
Feedback muchly appreciated.