If you want to get in touch, then email is perhaps the best option. While I rarely manage to get to Inbox Zero, I am quite good at replying within a few days.
The most up-to-date list of my publications is typically on my Google Scholar profile, though I do try to keep this website up-to-date too.
I generally publish code and other resources on Github.
From time to time I tend to answer questions on Stackoverflow, and I'm relatively proud of myself of having made it into the top 9% overall with my score!
I also maintain a classy presence on LinkedIn and Xing. An arguably less classy presence is my Twitter profile, which however is perhaps the second best way of contacting me.