A D20 RolePlayingGame Java engine with a Graphical User Interface, aiming at granting a Dungeon Master maximum control over gameplay to meet most challenging encounters, rulewise, through a slick GUI. Now geared at 4th Edition Dungeons and Dragons.

Another added bonus is that the people over at Softpedia downloaded nPlayer without me suggesting it or anything. That's quite cool I think as they seem to actually have tested the program. As such they have verified it's free for adware, spyware and viruses, something which is a bit comforting for you guys I bet: