Frameworks

Core contributor to highly successful expresso framework for critical year before it rolled out it's first worldwide popular version (4.0), focusing primarily in useability and UI issues. (It was a very vibrant project in 2000, when I was involved.)
 
Founding contributor to keel framework, supporting first the marketing side, site management and wiki. Later automation, tools, and useability features. This framework died a slow death by 2007, we never recovered from the emergence of a much stronger and easier to use SpringFramework.
 
Interestingly - as per Neal Ford of Thoughtworks - frameworks are being increasingly seen as an anti-pattern. My early experiences with frameworks tend to validate that point of view, as if a framework for getting something done almost becomes "Tail Wags Dog".  
 
Regardless of which frameworks you do or do not espouse (SpringFramework, etc) the use of frameworks will not go away easily. I've learned a lot from this evolution over the past decade, and expect to learn much more by observing the evolution of frameworks towards 2020.