Tumult HyperEdit is an excellent editor that can be used for a number of situations. It works equally well with HTML, PHP or CSS.
Thanks to its WYSIWYG feel, Tumult HyperEdit is simple enough for even beginners to get to grips with. The application offers real time preview of your changes such as when rendering or applying different CSS on a page.
The live HTML W3C-based validation tool will show you errors in red and store them in an error drawer. Tumult HyperEdit also highlights syntax with different colors and fonts.
Tumult HyperEdit can not only be used for creating websites but is great for correcting bugs, previewing CSS or testing PHP code.
Overall, Tumult HyperEdit is pleasant to work with and has enough features that most programmers and designers will enjoy using it. An excellent choice.