Motivate them the right way: award points for whatever your users do, and watch the activity chart fly high! via CubePoints.
WordPress › Duplicator « WordPress Plugins
Duplicate, clone, backup, move and transfer an entire site from one location to another in 3 easy steps. via WordPress › Duplicator « WordPress Plugins.
Avoiding Broken Links Using WPML’s Sticky Links
http://wpml.org/tutorials/avoiding-broken-links-using-wpmls-sticky-links/
Audiobar
http://wordpress.org/extend/plugins/audiobar/