Hand Drawn Animation
I have used stretch and squash in a recent animation produced for REACT in Bristol. The drawings were
Model Animation
Ladislas Starevich was a Russian animator notable for producing the first puppet films which he created out of dead insects.
Svankmajer
Bruce Bickford produced these plasticine model animation for Frank Zappa's babysnakes/
Cut Out Animation
Terry Gilliam used a cut up collage technique to produce the animations for Monty Python.
Bob Godfrey's Do-It-Yourself Animation Show: Terry Gilliam demonstrates how he produces his animation using cut out and glass to kep the shapes flat. Of course this is much easier to do in photoshop or animate. Gilliam went on to direct films such as Time Bandits (1981) and Brazil (1984)
Vector
Han Hoogerbruge made a series of animations in flash for his website http://ml.hoogerbrugge.com/. Flash has evolved into animate which can be used to create the same hard edged animation.