Storify is a tool that allows you to create stories using social media like Tweets, video and photos. Combining these tools to create one online story provides readers with a more well-rounded understanding and better context than any one of these tools used by themselves could provide.
One example of a nonprofit making use of this tool is Foundation Center. You can view their Storify creations here. This is a particularly good example of how Foundation Center combined photos, a presentation uploaded to SlideShare, and Tweets to create a story about a presentation recap.