http://freshmeat.sourceforge.net/projects/smarthtml/

https://bestpractical.com/request-tracker

RT is an enterprise-grade ticketing system which enables a group of people to intelligently and efficiently manage tasks, issues, and requests submitted by a community of users

https://www.interchangecommerce.org/i/dev

Interchange is a web application server, electronic catalog, and database display system

https://twistedmatrix.com/trac/wiki/TwistedProject

https://turbogears.org/

https://rubyonrails.org/

Imagine what you could build if you learned Ruby on Rails…

http://www.chmaas.handshake.de/delphi/freeware/xvi32/xvi32.htm

http://www.xmlmind.com/xmleditor/

http://www.xemacs.org/

XEmacs is a highly customizable open source text editor and application development system. It is licensed under the GNU Public License and related to other versions of Emacs, in particular, GNU Emacs.

http://www.winedt.com/

WinEdt is a powerful and versatile all-purpose text editor for Windows with a strong predisposition towards the creation and compilation of LaTeX documents...