Technically, traditional isometric lines are around 22.6º(2:1 pixel ratio/step), not 45. There are very few games that do the 45º stuff... Boktai is one of the more well-known of them:

http://www.vizzed.com/videogames/gba/screenshot/Boktai%202%20-%20Solar%20Boy%20Django-2.png (Unsupported image host)

But it is a very weird angle of graphics to look at, and even weirder to make.

Of course you didn't mean that angle, but the more you know