If you are looking to run Palm OS apps on your webOS device, Classic by MotionApps is the de facto application when running legacy Palm apps. To celebrate Earth Day (which is today), MotionApps is running a limited time Classic Going Green promotion. Classic, normally priced at $29.99, is now available for $19.99. If you’ve got a desire to run all those great Palm OS apps on your webOS device, you’d likely want to jump on this offer. They offer a fully-functional test drive and it’s not clear if the promotion price ends tonight.