1. A dump of the Lego set database. It is from 2014, but it could be a good starting point for your own database needs
2. A stocking and stackable lego strategy
3. A web site to know what else you can build with your pieces.
4. A replacement part site with manual download too.
   1. By the way search 10188 for death stars replacement (red/blue swords!)
   2. 10179 for millenium falcon

Tonight I stubled upon PropEr, a Property based testing tool for Erlang. It seems a very smart idea: instead of writing a single unit test, you write a set of properties your code must satisfy.