The built-in HelpPopup, available since Matlab R2007b, has a back-door that enables displaying arbitrary text, HTML and URL web-pages.
The EditorMacro utility was extended to support built-in Matlab Editor and Command-Window actions and key-bindings. This post describes the changes and the implementation details.
EditorMacro is a new utility that enables setting keyboard macros in the Matlab editor. this post details its inner workings.
The Matlab desktop enables saving and switching layouts using the main menu. This post shows how to do so programmatically.
cprintf is a utility that utilized undocumented Matlab desktop functionalities to display color and underline-styled formatted text in the Command Window