I came across IBM AlphaWorks’ Struts Action Scripting a few weeks ago. It sounded interesting, but it suffers from the same problem as everything AlphaWorks: ambiguous licensing. It’s not open source, and it’s not even concretely commercial (there’s no defined “price” and distribution terms under which you can use the software). So, I’m happy to read about this project: Scriptable Struts Actions Using BSF
Actually, there is no license displayed anywhere for Struts BSF, but it does sound like the intention is for it to be open source.