Web Developer Checklist
Liked the favicon part, very often forgotten...<p>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<p>One thing I would add which is driving me crazy on mobile / tablet sign up pages<p><pre><code>  - make sure your email fields are annotated with type="email"
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Another common issue is with SSL mixed content waring, so I would also add<p><pre><code>  - make sure to use protocol relative / https only URLs 
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(with a reminder to NOT use protocol relative URLs in email templates, your outlook users will appreciate it)