Sketching a roleplay system with much less violent conflict, and more focus on social challenges and adventures. Ghibli instead of Gygax.

Huge numbers of free D&D maps

Well written article critically examining the 3.5 diplomacy skill, and building a replacement mechanic in a sensible way.
This is a great way to approach making changes to a game's mechanics.

community expansion to NWN2

looks good - have to start at the beginning I think