Vim - Editor

Vim is an open source editor created in 1991.

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33Years Old

Vim (; a contraction of Vi IMproved) is a clone, with additions, of Bill Joy's vi text editor program for Unix. It was written by Bram Moolenaar based on source for a port of the Stevie editor to the Amiga and first released publicly in 1991. Vim is designed for use both from a command-line interface and as a standalone application in a graphical user interface. Read more on Wikipedia...

Vim website
Vim Wikipedia page
There are 147,766 members in the Vim subreddit
There is a central package repository for Vim
vim.org was registered in 1997
See also: (17 related languages)C, Unix, Linux, iOS, Android, vi, Tcl, Lua, Perl, Python, Racket, Ruby, Regular Expressions, Gzip, FTP, HTTP, Unicode

Example from Wikipedia:

" This is the Hello World program in Vim script.
echo "Hello, world!"

" This is a simple while loop in Vim script.
let i = 1
while i < 5
  echo "count is" i
  let i += 1
endwhile