Flash Block Detector
This is a pure-JavaScript library that detects whether Flash is blocked on the current page due to a Flash blocking extension.
Premailer
This site takes any html page and transforms it for use as a html email, moving all styles inline and making all links absolute, taking a lot of the tiresome legwork out of making beautiful emails.
Linux.com Store
All kinds of linux merchandise designed by members of the community. Found this little gem in the source too:
<meta name="generator" content="The Tux Capacitor has 1.1 Gigawatts of power." />
Airfoil
Supercharge airtunes in your Airport Express or Apple TV, Airfoil lets you send any audio source to any or all of your airtunes enabled devices, and you can even turn your mac or iPhone into an airtunes speaker, very cool.
Gravity Hook HD
A new iPhone game coming soon, from the makers of http://www.canabalt.com with a flash demo on the site as well, really looking forward to this one.
Forrst
A new community site for designers and developers, sharing links, code and images. It's in private beta at the moment but it's full of great content, and I can see it really taking off.
Ok Go's latest music video is even more awesome than the one that made them famous.
border radius
I doubt anyone ever remembers the exact markup for rounded corners in CSS3 using border-radius, getting it to work in webkit, gecko and future-proof normal css; this page makes it really easy.
