Passmarked is THE tool I've been looking for to check the quality of websites (mine & clients'). The open source list of tests makes it incredibly useful and flexible for integrating into the development workflow. It's only just been launched but there's already a tremendous amount of coverage that will only get better as more people contribute.
The fact that everything is in one place and that some of it is community driven has been amazing for actually learning beyond quick fixes.
I like it! I used it my website
PH should pay Passmarked for all the new aquisitions.
Passmarked lies at the core of web standards; specifically at the intersection of trust, code, data and software development.
The tool I wish I'd built!