Interesting tools for web application quality

We are listing tools/approaches here that we found interesting, but haven't adopted yet.

Verifying the layout of web application: https://dl.acm.org/citation.cfm?id=3192407 https://github.com/uwplse/cassius/

Debugging memory leaks in web applications (Browser-side): https://dl.acm.org/citation.cfm?id=3192376 https://github.com/plasma-umass/BLeak