Quanta Plus (KDE)

KDevelop   (Compare Project)

Mostly written in C++

License: gpl

jEdit   (Compare Project)

Mostly written in Java

License: gpl

CKeditor WYSIWYG editor   (Compare Project)

Mostly written in JavaScript

License: gpl, lgpl, mozilla_public_1_1

Scintilla   (Compare Project)

Mostly written in C++

License: Unknown

SunEditor   (Compare Project)

Mostly written in JavaScript

License: Unknown

PHPEclipse   (Compare Project)

License: common_public

Macromates TextMate Bundles   (Compare Project)

Mostly written in Ruby

License: Unknown

snippify   (Compare Project)

Mostly written in Python

License: mit

Ikarus Framework   (Compare Project)

Mostly written in JavaScript

License: lgpl3

MVC Editor   (Compare Project)

Mostly written in C++

License: mit