These are the sllides from a presentation at the local Linux LUG.
They are quite bare as most of the demo was hands on keyboard.
Slides from Introduction to Jenkins at the FLUX Linux Meetup.
Slides from a (now dated) talk on GPU computing. It's dated in the sense that it's now a lot easier to do this than 5 years ago when I gave this talk. I'll try to update soon.
Slides from a video editing demonstration using Lightworks and other Linux tools.