Quix is a bookmarklet which opens a command prompt, then responds on demand to what you enter. For example, if you type tr, the page you’re currently on will be translated using Google Translate. It can also understand more complex commands,img ducks, will go to Google Image Search, looking for images of ducks.
You can also select a word on the page, and use that as input for the command. For instance, if you select the word bookmarklet, then click the Quix bookmarklet in your links bar, and just type d in the prompt, it’ll take you to a Google Dictionary search for the word bookmarklet.
There are commands to search the currently open page, Flickr, IMDB, Wikipedia, Netflix, and more. There are Quix commands that will send the current page to Readability, Delicious, Twitter, Tumblr, Posterous, and others.
See a complete list of Quix's built-in commands
If those aren't enough for you, you can extend Quix using your own custom commands file.
Watch a video: An Introduction to Quix
Read an earlier post on bookmarklets
Thank you to @sharnon007 for pointing me to this resource.
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