I love this thing...so I'm sharing it. When reading on the web, I sometimes bump into unusual words that I haven't heard before. Most of the time I want to look them up, in order to improve my grasp of the english language, but often that's a huge distraction from whatever I was busy reading, so... I did a web search and found this really cool (and free) tool. It's a right-click context menu item, that lets you look up any word you right-click on the web (don't even have to highlight it first), and the definition of it appears in a popup, easily dismissed afterwards. Pretty cool! Oops, link removed, so just saying you can find this tool by googling my post's title.