About I am a software developer on the Jython (http://jython.org) and Neo4j (http://neo4j.org) teams. My presentations and shared slides are usually on the topic of either of these projects. With Jython my involvement is mainly on compilation, code representation and performance optimization, thus that is most often the topic of my Jython presentations. With Neo4j my main involvement is in tooling and framework support.
I also try uploading the originals for my slides here: https://github.com/thobe/presentations