Extra ToC generate table of content based on chosen html tags ( H3 - H6 by default) and show it in different way.
After click on ToC item target header will be highlight and page will be scrolled to it.
Plugin can include generated ToC inside vertical Page Break menu and place result in published custom HTML module or in any other module with chosen class.
To correct work with splitted pages move 'Extra ToC' before 'Page Break' plugin.
Extra ToC can generate short synonym to long header by extract it data-short attribute.
This is free extension, but if you want support - it will be for donate only.
So... keep your money and forge curiosity :).