Storify is a curation tool. You can grab social-media content (such as Tweets, photos, FaceBook entries, videos) on a topic and publish it. Because you can search for hashtags or terms it is great for summarising an event. You can embed them in blog post an share them socially to record an event. They are a really good way of reviewing a conference. This is a link to a storify I created about a conference I went to in December.
This storify follows the resignation of the Pope: