Thanks. Fast response as always!
Have you an overview with all known widgets/layouts (other than the ones, made by you)?
It could also definatly be a good idéa to make a new template for layouts, other people could jump on (Remember comments 
) - and also recommend to put something like “discourse-layouts” as topic in their Git’s.
Update:
I think a lot of people will appreciate an example where custom_fields for plugins is included, too (user-editable options) [1] [2].
Update2:
Just a tip - I think you need to update the code behind the Twitter-solution. The widget showing up one more time, after each page-visit (without reload). I had the same issue with $( document ).ready(function() {}); after you improved how the scripts is handled. I’m not using the Twitter-widget feature at the moment.
Update3:
If you prefer to have the a-link in the Bookmarks-title, it would be nice if there was a call to the users bookmarks as well 
