ControlC is an interesting new site that takes normal copy and pasting (Ctrl-C) and runs it through a web service.
At its most basic, after you create an account and install the software, any time you hit Ctrl-C, the information is saved to the ControlC website as well as your local clipboard, as simple text or as a URL link if what you’ve copied is a link. The information is both private and encrypted, although you can make any item public if you like. Public information can be accessed by friends on the site, via RSS, or an API, commented and rated. This is done via a small download that’s available for Windows or Mac machines. The entire project is open source.
What can it be used for? Well, the most obvious use is a simple way to permanently store anything you copy to your clipboard onto the web as well. It’s comparable to some social bookmarking applications that also allow copying of selected text from a website. The main difference is that ControlC works on any application, not just the browser and web pages.