Below: Don Steward Plans and Elevations
MissBrookesMaths (collation of Resources)
Below: Handy Isometric Tool
Drawing your Dream House
Above: Google Sketchup (Software)
An online isometric paper tool. Great fun!
Useful online tool that builds using cubes. I guess… minecraftish.
You can send your finished design to a 3D printer, which is pretty fantastic.
Create quick tetrahedrons from standard envelopes.