Why: ne is a free (GPL'd) text editor based on the POSIX standard that runs (we hope) on almost any UN*X machine. ne is easy to use for the beginner, but powerful and fully configurable for the wizard, and most sparing in its resource usage. Even though ne is not as powerful as vim or emacs, but ne is very easy to use with the compatible shortcuts for those who come from Windows. I can directly install ne from almost all major linux distros.
Is it Open Source: yes
How many users do you anticipate will use this software? Thousands or more
Link to source tarball/zip file: http://ne.di.unimi.it/ne-3.0.1.tar.gz
github repo: https://github.com/vigna/ne