Since getting my instrument rating last September, I've become interested in "electronic flight bag" solutions for charts and instrument procedures. I looked at different applications and platforms, but what I'm using at the moment is the Foreflight application on the apple iPad.
When I went looking for applications, one feature I felt was very important was the ability, when flying IFR, to switch between the IFR en-route chart and an instrument procedure and back with the minimum amount of interaction. You can do that in Foreflight with a single click in either direction.
Here's a video of me demonstrating two things on Foreflight. First, bringing up a new instrument procedure from the en-route chart, and then flipping back and forth between that procedure and the chart.