Junction is especially useful on the web, because it can show the complete URL when you click a link, and can also flag insecure links.
Do you need to use different apps to open the same type of file depending on what you want to do? For instance, while you usually want to open an image in an image viewer, sometimes you want to send it to an image editor instead. In such a case, the Open With context menu option comes in really handy. But if you need to make this choice a lot, bringing up the Open With dialog box can become exhausting.