Thread:Mhommer/@comment-26090008-20150210223232/@comment-15636815-20150211172733

I use GIMP. It's powerful, and it's free. Many people say it's better than Photoshop, plus it's available for Mac, PC, and Linux, so whatever you have will run it.

I need to go run some errands right now. Later today, I'll post detailed instructions for creating the proper images with GIMP. Our current Style Guide has instructions for creating them using Photoshop, but the instructions don't translate well for GIMP.