Absolute floating menu is a module for Joomla that allows to make other modules to follow user scrolling, returning to a visible area. This animated process will surely draw visitor's attention to whatever there is, be it a menu or a toolbar.
Clicks on links to named anchors on the page scroll smoothly to target.
Fixed'n'Sticky is a module for Joomla that allows to make other modules appear locked (fixed) within browser window whenever it's module position is shown.
Knowledge that other people are browsing your products can give additional nudge to act.