Dreamweaver-integrated, small web CMS.
Write and preview HTML and PHP with this editor.
Track your bugs easily.
AppleScripting utility which creates rich GUI commands quickly and easily.
Paste in some JSON that's giving you trouble and this will highlight in red where the problem is.
System modeling & software design.
GNU Emacs text editor.
TextMate XML/XHTML validator plug-in
POU file editor for programmable logic controllers.
Text editor with syntax highlighting and other convenient features for programmers.
Work with regular expressions easily.