Planet Cute tile set

In a genre thirsty for bitmap tiles, there are very few great pixel artists working in roguelikes. Virtually all the Angband variants use the tile sets from just three artists: Adam Bolt, David Gervais and the original 8x8 tile set which is uncredited but has recently been supplemented by Dawnmist.

I strongly urge you to have a look at the pixel art from Danc at Lost Garden (RSS). He's just released a Planet Cute tile set that looks beautiful. It includes vector art, so should be scalable to whatever size tile set you are looking to create.

Not only that but along with the release, he discusses 'How to Bootstrap Your Indie Art Needs'. Have a read.