Check out my Tombstone 2 as well! This is a free, low poly model of a tombstone to be used in video games. There are .obj, .fbx and .3ds versions of this model. Textures are also included (Diffuse, Normal and Specular) and are UV mapped.
OBJ (OBJ, filesize: 3.52 KB), 3DS (3D Studio, filesize: 1.57 KB), FBX (Autodesk FBX, filesize: 14.1 KB)