Hexels is a cool little art tool developed by the guys over at Hex-Ray Studios, makers of my beloved sleep aid and geek toy, Pixel Fireplace. I just downloaded the free version for a trial and gave it a shot. After a few minutes of playing, I kind of had a little old-school JRPG world map thing going on:

In addition to giving you tons of colors and a hex-based grid to play with, Hexels also has a cool “glow” feature, which allows you to apply a nice glow effect to the entire image, sliding it to be either blindingly radiant or nonexistent.
Nice, pretty, clean-and-easy UI, too.

The pro version, which I’ll likely buy because I’m like that (and also omigodthisisocool!), has a ton of other cool features. You can use other shapes besides hexels (including pixels or trixels) and you can create cool new kinds of glow effects and export to a variety of formats I’ve never even heard of before.
Also, their file type is the .hxl, which — come on, that’s cute.
I’ll probably post a more detailed geek-out once I’ve spent some more time with Hexels, but in the meantime, if you’re into pixel art and such like, you should definitely check out this sick little tool.
Personally, I’m excited to see what kind of cool-looking game I could make using these sorts of images!