ShowHow is a collection of applications and HTML5-based tools to help users capture, annotate, and navigate expository video content.
Users can also add a variety of multimedia annotations to tutorials. Here, a user has added steps with descriptions as well as an image. These additional details can provide additional context for people following the tutorial.
Users can access tutorials from Google Glass as well as the web.
I wrote several papers on this system with my colleagues at FXPAL. This paper is probably the best overview.
I also created a video for ShowHow for the #ifihadglass program.