The Markdown Editor for Linux
Emacs Markdown Mode
Emacs incremental completion and selection narrowing framework
Realtime collaborative markdown notes on all platforms
Parser generator to read, process, or translate structured text
The Superior Lisp Interaction Mode for Emacs
Jupyter Notebooks as Markdown Documents, Julia, Python or R scripts
Web template editing mode for emacs
Collection of add-ons for SynWrite editor
Notepad++ plugin to configure normally not available settings
Notepad++ plugin to display line numbers in a custom format
Subtitle Editor derived from 6.0c, but with VLC and Hunspell checker
Cross-platform text and code editor
A vi-like editor based on Plan 9's structural regular expressions
A graphical text difference analyzer
Basic cross-platform tree view XML editor
jEdit is a programmer's text editor written in Java.
Notepad for Windows, Linux, and Mac platforms
Tinn-R Editor - GUI for R Language and Environment
SC is a C based meta/programming language/environment