Liked the favicon part, very often forgotten...
Would be nice if this was open sourced so more items could have been added by the community (also framework specific checklists) but I like the concept
One thing I would add which is driving me crazy on mobile / tablet sign up pages
- make sure your email fields are annotated with type="email"
Another common issue is with SSL mixed content waring, so I would also add - make sure to use protocol relative / https only URLs
(with a reminder to NOT use protocol relative URLs in email templates, your outlook users will appreciate it)