My main video editing tool is simply iMovie on my Mac. Serves all my needs except one. I shoot with my Contour at 60fps so that I can add in a slow-mo clip at 30fps and it looks smooth as silk...unfortunately iMovie can't convert 60fps to 30fps so I actually use GoPro's free software to do the conversion of those clips from 60fps to 30fps. Then I import those into iMovie.

Have fun and good luck!