This incredibly thorough rundown on Angular performance, performance testing, as well as dos and donts while developing should likely be reading material before setting off on a large-scale Angular app.
I can think of several great uses for this in an app, but the first one that comes to mind is building your own tutorial workflow to show a user what to focus on next - triggered sequentially or as a result of a manual action.
The material design craze continues here with a library that helps you morph from SVG icon to SVG icon. This wouldn't have been on the list normally as a tool since it's so niche and also purely aesthetic, but it's on the front of this interesting "material design" wave as well as the SVG icon wave. An interesting intersection point.
"There are a lot of people out there who write docs, but there isn’t a good place to go to find information, ask questions, and generally be a member of a community of documentarians. We hope to slowly solve this problem..." - writethedocs.org
This is a common task for devs looking to visually improve form elements. Generally, the select and text inputs have gotten plenty of attention. The general hide-and-represent-the-input strategy can be used for checkboxes too.