If you have ever wanted to direct someone to multiple websites at once, 1link might be the tool for you. Here, you can enter multiple URLs into a box, one line per URL (no registration required), and then get one small URL in return. When a user clicks the URL, they are taken to a page that displays all of the included addresses. Another click will open all of the URLs as seperate tabs in their browser.
It's a nice tool should you want to direct someone to a bunch of resources you found on a particular topic without forcing them to click multiple URLs. You could also use it to prompt a series of downloads, or showcase multiple products to an interested party. Of course, the small URL makes it an ideal candidate for micro-blogging sites like Twitter.