This free icons pack provides nice web 2.0 collection of operating system logos. In .zip downloaded package you can find 18 .png and .ico symbols, including Windows, Linux penguin, Ubuntu distro, Apple in more colors, etc. Free operating system icons pack is released under Creative Common Licence and produced by a member of DeviantArt.
Nice high resolution icons. Thanks
For me, the best operating system is Linux because it rarely hangs.,~”