Here's a quick tip. Don't make your logos/icons in
Gimp or even PhotoShop, as their Raster editors. You wanna use a vector editor like
Inkscape or
Raven. The reason why is with a vector editor you can make your logo in say 100x100 and scale it up to say 800x800 and rotate it a bunch of times, and it'll NEVER loose quality. (notice thoughs images have a ruff edge, and are choppy)
When you save a vector file it's usually an .svg file type. SVG stands for Scalable Vector Graphic, and trust me this is a huge help, and really keeps your projects looking professional, and nice.
Raster Editors like Gimp, and PS are nice, but rotating them, scaling them, and such they loose their quality, and it's not good for making logos/icons.
This image below is simple, but explains a lot on the differences, and how raster editors work compared to vector editors.
Dead image link removed. Admin.However I don't want you thinking that when you import a photo into a vector editor link Inkscape or Illustrator that you'll now all of a sudden be able to scale, rotate it, etc: at 50x50 and make it 800x800 and except exactly the same quality (I can see that happening in the future, but we're not there yet) as it's not gonna happen. You'll haft to make it a vector image yourself drawing circles, and crap over yourself in order to turn it into vector. Get what I'm saying?
So hope this quick tip helped you out bro.