- I am CEO of Active Group.
- We do most of our software development using functional programming and I am a co-founder of the leading German-language blog on the subject.
- I co-organize the BOB Developer Conference.
- I'm general chair of ACM SIGPLAN International Workshop on Functional Art, Music, Modelling and Design (FARM) 2017.
- I serve on the Steering Committee of the ACM SIGPLAN International Conference on Functional Programming.
- I'm on the Editorial Board of the Journal of Functional Programming.
- The Reacl UI framework for ClojureScript
- Scheme 48
- The scsh Scheme Shell
- XEmacs/ EFS/ Dired
- The Lula system for stage lighting design
- More complete list of software projects