Climatics (also known as HangLoose) has many disk images ready to download. Try this one if LGD
is full or out of order. All Medway Boys, Automation and Pompey Pirates menu disks available.
SainT is a very good ST emulator for Windows 9x/NT. It runs many demos. Currently there's almost no documentation or manual for it. The current version does not have joystick support!
STonX is an ST emulator that runs on Unix machines. However its performance for games and demos is mediocre. It may be usefull for GEM based work. Supports TOS 2.x only!
WinSTon is another ST emulator on Windows 9x/NT systems. It is compatible and easy to use and to configure. However, development of WinSTon stopped but the source code is free and the STEW project is based on the WinSTon code..
EmuTOS is a singleuser singletasking operating system for Atari ST computer emulators. [...] It is thought as a replacement for the TOS-images you usually need today on these emulators.