[Vaskerville]

This seems like a good moment to remind about Jürg Lehni & Uli Franke's Hektor (2002): http://juerglehni.com/works/hektor.

[sf_rob]

This one is so much cooler. Linear controlling is the obvious solution, but this does the proper approach angles which is awesome.

[SiftedTech]

oooooh!