Simply Testable is a free-to-use web application that automates the HTML validation part by validating all the pages of a website.
Tt seems that every theme is now responsive. Certainly the web will only become viewed on more and more different devices so it makes sense to build in some sort of responsive-ness but maybe targetting actual screen resolutions will be obsolete and we will make all layouts fluid. Here is a roundup of 30 ultra-clean business and portfolio WordPress themes that are all responsive
ResponsiveAeon is a HTML5/CSS3-powered framework for creating responsive layouts very quickly.
Nimble is a big, bold, and beautiful theme that doesn’t let its own image get in the way. With each design it strive to strike a balance between style and function. Nimble’s colors are toned down but still delicious and its style is bold but still leaves room to breath. Browsing Nimble on a 27″ Cinema Display is quite a treat, but so is browsing the theme on a small screen as well due to Nimble’s fully responsive design. I’m quite pleased with how it turned out! As with all of our themes this one comes with some great features, so let’s take a closer look.
PNG is useful on the web because it's the only widely supported format that can store partially transparent images. The format uses compression, but the resulting files can still be large. TinyPNG that only works with PNG files, shrinks them -nearly- without loss that an eye can see and by keeping the transparency.
CSS FilterLab is a free-to-use online application, created by Adobe, for discovering CSS Filters & CSS Custom Filters.
TideSDK is an open source platform for building desktop apps using web technologies (HTML5, CSS3 and JavaScript).
If you need a base when starting a new project and don't want it to be complicated, Kube Framework can be a good choice.
WP-Piwik is a WordPress plugin which adds a Piwik stats site to your WordPress dashboard. It's also able to add the Piwik tracking code to your blog using wp_footer.
Piwik is a free downloadable open source web analytics software. Piwik provides you with detailed reports on your website visitors; the search engines and keywords they used, the language they speak, your popular pages, and much more.