MicroEMACS
MicroEMACS is a compact and portable text editor inspired by Emacs, initially created by Dave Conroy in 1985 and subsequently overseen by Daniel M. Lawrence (1958–2010). It has been adapted to run on a wide range of operating systems, such as CP/M, MS-DOS, Microsoft Windows, VMS, Atari ST, AmigaOS, OS-9, NeXTSTEP, alongside multiple Unix-like platforms.
There are various derivatives, including mg, which provides enhanced compatibility with GNU Emacs. The vi-inspired editor vile traces its origins to an earlier iteration of MicroEMACS. Furthermore, the simple text editor Pico from the University of Washington was developed based on MicroEMACS 3.6; its user interface served as a model for the free alternative GNU nano due to the licensing complexities surrounding Pico.
Significantly, Linux founder Linus Torvalds has been a long-time user of MicroEMACS since his university years and continues to maintain a personal fork available on GitHub.