With greetings from Croatia comes the DD1. Direct drive assembly upgrade for the Ultimaker, which enables you to get rid of the short belts on your X and Y axis. Idea behind it is to have one less source of potential backlash, and thus more precision. It is laser cut in plexy.
Development is under way and first in-action videos with downloadables will be available shortly.
Files are available for download at http://www.thingiverse.com/thing:58570
The mastermind behind it is Chopmeister, one of the lead Croatian 3d printing scene experts.