Most code editors are similar to notepad.exe in that they are "text editors", but unlike notepad.exe they have functionality built into them to send the code into the compiler.

Here are some free WYSIWYG HTML Editor software and online tools. You can edit the output content and HTML source code and preview it.

Espresso is a gorgeous Mac-only code editor that’s powerful and smooth, like the caffeinated beverage it’s named after. This ...

The new PyScript project lets you embed Python programs directly in HTML pages and execute them within the browser without any server-based requirements.