XEmacs

SXEmacs   (Compare Project)

Mostly written in C

License: BSD-3-Clause, gpl3_or_later

Pida   (Compare Project)

Mostly written in Python

License: gpl

JOE - Joe's own editor   (Compare Project)

Mostly written in C

License: gpl

Jupp’s Own Editor   (Compare Project)

Mostly written in C

License: GNU_General_Public_License_1_0

Vim   (Compare Project)

Mostly written in Vim Script

License: Vim_License

CKeditor WYSIWYG editor   (Compare Project)

Mostly written in JavaScript

License: gpl, lgpl, mozilla_public_1_1

Macromates TextMate Bundles   (Compare Project)

License: Unknown

Programmer's Notepad   (Compare Project)

Mostly written in C++

License: BSD-3-Clause

yi   (Compare Project)

Mostly written in Haskell

License: gpl

SynEdit   (Compare Project)

Mostly written in Pascal

License: gpl, mozilla_public_1