[eranation]

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)

[loosepackets]

> Would be nice if this was open sourced so more items could have been added by the community

https://github.com/ligershark/webdevchecklist.com

[BCM43]

It is open source, but I can't seem to find a license on that page, so it may not be free software. I would be reluctant to modify and redistribute copies of it.

[madskristensen]

An Apache 2.0 license has just been added

[rickmb]

favicon is only forgotten by those that never check their logs.

(Which should be part of the checklist, check your friggin' logs instead of assuming you never miss anything.)

[WickyNilliams]

Protocol relative URLs for stylesheets unfortunately cause a double download (one for both HTTP and HTTPS) in IE 8 and below, which is a damn shame. Paul Irish has a lot of info on this here: http://paulirish.com/2010/the-protocol-relative-url/

[ajessu]

> 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

Just to share, since you mention framework specific, a similar concept exists since a while ago for the PHP symfony (version 1) framework (not official, but I quite liked it back then)

http://symfony-check.org/