1link.in is a shortcode service with a difference. The difference is that it allows you to configure one link to open multiple pages.
I’ve not seen anything like it before (which often means there are a dozen similar tools out there).
The service works just like Bit.ly or TinyURL, by allowing you to paste in a link to shorten it. But it specifically allows you to embed a number of pages in that link, something that the other tools don’t (yet) offer.