TTF-GDOS is an Atari GDOS replacement that uses true type fonts
Machine Language Monitor for Commodore VIC-20
Message passing microkernel-based Operating System for ZX Spectrum +3e
A ZXMMC mass storage device FID driver for CP/M
TUI file manager (NC clone) with built-in Zip for DOS and Windows
FreeMiNT is a free alternative OS kernel for Atari systems & clones
Text mode file and archive manager for Windows