The slides are by Toni and Aljoscha, from the recent training done in Ulm. (So, these slides are also useful to anyone who was on that course and wants to look through the slides again.) The first set of slides that you see above is a very good introduction to the NetBeans Platform, by Toni.
Click the image above and you will jump to the page. There you'll find the slides listed above. Happy teaching/learning!