I’ve rolled new versions of the widgets with a minor bugfix. If you activate a widget without having the AutoMattic Widgets Plugin (AWP) turned on, you’ll either get a blank page on your site or you’ll get an error (most likely “Fatal error: Call to undefined function register_sidebar_widget()“).
The new versions will silently bypass the widget registration process if the AWP is not activated. It’s not exactly the way I wanted to do it, as I would have preferred to deactivate the widget automatically if the AWP wasn’t activated. The problem is, given how plugins are loaded, my widgets are often loaded before AWP, so they would never be active.