I absolutely don’t see how Moodle can be rated THAT high. It’s anything but super powerful. I tried it for my coaching program and was quite bummed that it doesn’t have a video chat or anything of this kind. I had to create a separate youtube channel and run workshops from there. The design is not too impressive as well, if that matters for you of course (which was my case).
Moodle
Kris Perrel reviewed on 14 May 2012
OmniGraffle Pro
Kris Perrel reviewed on 09 Nov 2011
Like Photoshop and similar, the working space is based on layers and bundled with tons of features.
I’m particularly impressed with the arrow flexibility, i.e. that you drag a box with 360 degree freedom and an arrow follows.
Mistakes are easy to undo.
Great document gallery.