PopClip appears when you select text with your mouse on your Mac. Instantly access context-specific actions including copy and paste, plus extensions like Send to Evernote. If you select text containing a URL, email address or file path, PopClip can open it. Select a misspelled word, and offers corrections. Select any text to do a web search with those terms, or select a single word to get the dictionary definition.
More than 100 free extensions are available, including Paste and Match Style, Translate, Send to Evernote, Word Count, Capitalize and much, much more. See http://pilotmoon.com/popclip/extensions.