<ul> <li><a href="https://www.nundroo.com/navigation/">Navigation Menu</a></li> <li><a href="https://superfluousbanter.org/archives/2004/05/navigation-matrix-reloaded/">Navigation Matrix</a></li> <li><a href="https://icant.co.uk/sandbox/footercollapsetables/">Collapsible Tables</a></li> <li><a href="https://www.flog.co.nz/lab/ARC/ARC.htm">Checkbox Customization</a></li> </ul>