Serious Game Engine Shootout
In keeping with our ongoing discussion on using game engines (orignial or commerical), there is a nice piece over at Serious Games Source. They posted a comparison on a variety of game engine that can be used to make educational games. The first few are pretty are pricey as professional engines, but around page 3 the price starts to come down. Even Neverwinter Nights gets a mention.
If you've been interested in our discussions here about other creating games or have an idea but not sure how to put it into code. This article is worthwhile. The comparision gave me a few other game engine ideas and provide techinical specifics on each.