We’ve recently introduced yet another demo application called widget browser. The widget browser is based on the widget overview featured earlier. Compared to the predecessor, the widget browser allows to switch themes and uses part loading to asynchronously load each tab.
We have integrated all core themes, including the new Simple theme. Part loading decreases the initial application start-up significantly, especially in the source variant. This is good news for theme authors who tend to reload frequently while developing. If you are considering to add part loading to your application, don’t miss to take a look at the code of the widget browser. You might also want to read our revised section about part loading in the manual.

Great job. This must be extremely useful for theme development. But most importantly, it is a great showcase and “selling point” for people who evaluate the framework.
I love the widget browser!!! It would be nice to see other themes like the darktheme or aristo being displayed there as well