Syntax highlighting and folding for GEDCOM
Parser generator to read, process, or translate structured text
Java based XSLT Processor extension for syntax highlighting
Meld Installer for Windows
PDF Concatenation Tool
CodeLite: an open source, cross platform C/C++/PHP and JavaScript IDE
FCKeditor (retired)
Vim-like editing in Eclipse
Tinn-R Editor - GUI for R Language and Environment
Open source text shaping engine
MadEdit-Mod is a cross platform Text/Hex editor based on MadEdit
Open/Libre Office extension for converting eBooks in fb2 format
All in one Text, Decimal, and Unicode Converter as you type.