Does anybody know who they do that?

nevermind, found out.

Dude, share the knowledge...

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The program they used for A Scanner Darkly was rotoshop.
This was done in another film called Waking Life just not as defined but still pretty damn good.

Here is a tutorial of how they did it in Waking Life. Your basic export to filmstrip, rotoscoping and a bunch of properties and layering yadda yadda yadda.

http://www.toolfarm.com/tutorials/wakinglife.html

You'll need Premiere, Photoshop and After Effects for this one. If anybody decided to do this let me know i'd like to see it very much.