Explore, interact, and download historical topographic maps from the USGS free of charge.
If you are a map fanatic like me this is the new cool site that open sources the USGS archive of all topos for free download.
Build cross platform desktop apps with web technologies
Excellent plugin to manage same domain or cross domain iframe formatting.
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
One of several handy utility sites for testing regular expressions and learning same.
Source: xkcd: Good Code
http://ui-patterns.com – nice UI/UX site for showing various techniques
I am not a skateboarder but this is way cool – especially the story about the challenges of motor design.