We're talking about models that are so low-poly, you could probably draw them with your eyes closed and a few swigs of espresso.
Quads: The Original Low-Poly Triangles: The Minimalist of Low-PolygonsOr, if you're feeling adventurous, head to:
QuadTree: Where Quads Go to Get Their Roots DoneOr maybe you're looking for some actual 3D modeling? Here's a special link for grown-ups