Speedtest puts the most sophisticated broadband testing and analysis tools into the hands of anyone interested in finding out the speed and quality of their internet connection.
Flavors allows you to create a gorgeous website in minutes, bringing together social media updates, photos, videos and more into a unified web presence. Free account available.
SpamCheck from Postmarkapp allows you to process the spam score of incoming or outgoing email messages, without the hassle of managing SpamAssassin. You can also utilize their light-weight JSON API to use SpamCheck in your own apps.
LinkTally is a free tool that allows you to enter any URL (even from your competitors' sites) to find out how many times it was shared on Twitter, Facebook, Google+, and LinkedIn.
WebPagetest allows you to find out how your website is performing. Run a free website speed test from multiple locations around the globe using real browsers (IE and Chrome) and at real consumer connection speeds. No account required.
Google's Structured Data Testing Tool will allow you to see how Google views your website's structured data. You may also use this tool to see if your structured data is properly formatted and verify authorship/publisher details for your site.
FollowerWonk helps you explore and grow your social graph and allows you to dig deeper into Twitter analytics. Find out who your followers are, where they're located and what they tweet.
Tunlr lets you stream content from sites like Hulu, MTV, CBS, ABC, Pandora and more to your Mac or PC, bypassing traditional regional content restrictions. Free to use. No account required.
MixRank is a free tool that allows you to view data on your competitors contextual and display ads. You can see where their traffic is
coming from and which ad copy is performing the best on thousands of Google AdSense sites.
Are You A Human was designed to help stop website spam. By using a program that only Humans can play (not a CAPTCHA) and web bots can't crack, it keeps site visitors happy and hackers away. Supports Wordpress, Drupal, etc. Installation help available.
UppSite allows you to turn your website into a mobile app. Simply enter your URL, customize the layout, and submit to UppSite. Then download and install the plug-in on your website. Share your app with co-workers, site visitors, etc. Works on Apple's iOS and Android OS.
Siteopsys provides over 30 automated tools (in 7 categories) that help Analysts, SEO Consultants, Webmasters, or Website owners to analyze a website for various SEO parameters.
Widgipedia.com A widget / gadget resource site that offers a selection of widgets as well as tutorials, code samples and reusable libraries for widget developers.
Free Online OCR Converts scanned images into editable text. This free service allows you to easily convert scanned documents, screenshots, faxes, and photos into editable and searchable text, such as TXT, DOC, or PDF. Simply select an image file, click Convert, and immediately download the resulting document.
Del.icio.us A collection of favorite web site destinations - yours and everyone else's. You can use the site to keep links to your favorite articles, blogs, music, restaurant reviews, etc. and access them from any computer on the web.