Modular Castle Level Construction Kit
This is a set of 11 models that all share the same Material. They have their pivots set up to be able to join together to build all different types of structures on a power of 2 grid. They are all very low poly (40-100 triangles). But wait.... There is more... they conserve memory resources because you can build an entire level out of them only using one texture.
I used it to build about 90% of the level that used in this video: http://www.repulse.com/the-castle-level-in-udk-completed/
Maps Included are Diffuse, Normal, and Specular. Each model has 2 UV channels. One for the texture and a separate for lightmapping. I also included the original PSD file, that you can edit if you want more variation on the pieces.