I’m a pixel artist and a game developer, but I hate making tilemaps.  To me, it’s just tedium – making the same image over and over with little tweaks for corners and edges.  And SO many combinations of corners and edges.
So when I heard there was a tool that would automatically create an entire tilemap from as little as just three images, I knew I had to try it.

AutoTileGen lets you create a game-ready tilemap from just three images.

All you need is a single tileable texture, a “cap and bottom” image, and a “sides” image.  If you want a background included in your tilemap, that’s a very simple forth image.  AutoTileGen then does all the tedious work for you!