A tool for the dual-head presentation of PDF slides on Mac OS X, most likely using a laptop and a projector. The project arose outof the need to correctly project slides created with LaTeX's BEAMER class.
Traditional PDF viewers require two displays to be in "mirror" mode in order to show the same image on both. The -- maybe not so obvious -- disadvantage of this is that the higher-resolution display is forced to used the resolution of the lower-resolution one. By keeping the two displays at their respective native resolutions in "extended desktop" mode, your slides will always look great on either side.
(This is a mirror, since the project was discontinued in 2011. Check out the repository.)