GX.Sigma
Adventurer
D&DN is compatible with OSR adventures, which as far as I know is the only source of good D&D adventure support right now.5e looks very interesting at the moment. I will probably hold off for a bit and see how good the published adventure support is. If they publish the same garbage dungeon crawls as they did in 4e I will quite possibly drop it.
Some might ask why I think published adventures are so important? Well, it's because I don't have the time or imagination to come up with everything myself. I can elaborate and wing it if I have a adventure that's fundamentally well made (Red Hand of Doom). I get fed up running adventures like Return to the Temple of Elemental Evil.