I love the systematic theme for Retroarch, but since I use LaunchBox, I rarely get to see it. So I converted a bunch of it to .ico pack for all of my rom folders. Sorry if this is the wrong place to post this. I couldn't find a more appropriate area. The icons are multi size, from 16x16 up to 256x256, so they should look good at any size. Not every systematic icon is converted, but pretty much any commonly used platforms should be represented. Enjoy!