Panel-level uicontrols
Matlab's uipanel contains a hidden handle to the title label, which can be modified into a checkbox or radio-button control
Pure Matlab
The hgfeval function
The semi-documented hgfeval function can be useful for callback chaining - this article explains how
Accessing plot brushed data
Plot data brushing can be accessed programmatically using very simple pure-Matlab code
Undocumented cursorbar object
Matlab's internal undocumented graphics.cursorbar object can be used to present dynamic data-tip cross-hairs
Docs of old Matlab releases
MathWorks recently posted archived documentation for many previous Matlab releases
Customizing uitree
This article describes how to customize Matlab GUI tree controls created using the undocumented uitree function
uitree
This article describes the undocumented Matlab uitree function, which displays data in a GUI tree component
COM/ActiveX tips & tricks
This article describes several little-known tips useful for COM / ActiveX programming in Matlab
Matlab DDE support
Windows DDE is an unsupported and undocumented feature of Matlab, that can be used to improve the work-flow in the Windows environment
Tab panels – uitab and relatives
This article describes several undocumented Matlab functions that support tab-panels