4GEM Central - A few links, small amount of interesting information.
Artline - Free downloads of GEM Artline (and Artline 2), first worldwide full-featured illustration application for IBM PCs. Released in 1988, it had full Bézier support, fully scaleable vector-fonts, PostScript support.
Devo's PC GEM Page - Operating system downloads (revisions, utilities, more), links, icons.
Digital Research's GEM: Intel 8086 version - PC-GEM fine descriptions, downloads.
FreeGEM WebRing - Sites that promote use and development of PC/GEM: can be anything from gaming to programming.
GEM - PC GEM and GEM documentation, downloads, links, news, screenshots, developer information.
GEM on the HP200LX - Using GEM on this HP palmtop: how to install, links, screenshots.
GEM Programs - Heinz Rath's page: downloads (desktop, drivers, games; binaries, source), documentation, links.
GEM Workshop - Part of the large Owen Rudge site: downloads (GEM Download Manager for Windows, drivers), links, history, information, screenshots.
GEM World - Descriptions and files, from the unofficial CP/M web site.
Intel GEM - Graphical environment for IBM PC and Atari ST. PC GEM was a fairly widely used GUI until the release of Windows 3.0. Now licensed under the GPL.