After converting the reflection effect from script.aculo.us to mootools, i found myself needing also to create simple shadows for images. So I compiled the reflection sample, added the shadow effect and created the efxFactory. This is still under development so it's BETA and a preview of what will be a final version of mootools extensions to the Fx library.

By simply using the efxFactory.shadow($("thumbShadow1")); to create shadows or efxFactory.reflect($("thumbRefect2"), {opacity:1/6}); to create reflections, you can add simple effects to images without using a image editor. Usefull for content management systems.