There are 3 modes StereoSketcher can use to display drawings:
Cross View
great text tutorial
text tutorial
video tutorial
odd, but very helpful tutorial
a tutorial with spelling mistakes
the cross view subreddit
Parallel View
tutorial
the parallel view subreddit
Red/Cyan Anaglyph
free 3D glasses
cheap 3D glasses
cheaper 3D glasses that take a while to ship
the red/cyan anaglyph subreddit