PocketMatrix

Try searching for key words like game, programming, tile, scrolling.

Here are some articles, maybe some will help.

http://www.gamedev.net/reference/list.asp?categoryid=44

Another zany tool to use is an image program like Paint Shop Pro or Photoshop. You can use layers and draw all your tiles (1 per pixel). When done, export as XPM. That format is ready to use in C directly. Just use one colour per tile type and you are all set.