HTML-Notepad - HTML WYSIWYG editor for structured documents
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
iNotepad - Write and organize all your texts and notes on Mac.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.