Since my Macintosh PowerBook goes with me everywhere, I tend to do my doodling at meetings etc. on it. This has resulted in a collection of about four dozen icons that I've distributed as freeware. The icon of me in the welcome paragraph of my home page is one of the first of these. Click on the JimB on the Web icon to go to a Web page that has the 8-bit versions of the icons as GIFs that can be downloaded individually.
Some browsers take a long time to load it.
I haven't had any problems using unzip on UNIX to unpack this archive. JimB's Icons is a set of four dozen freeware icons, largely of people. The subjects and styles vary. Some are portraits of friends or historical figures. Some are caricatures.