Via GSA’s Apps.gov: “Social media apps make it easier to create and distribute content and discuss the things we care about and help us get the job done. Social media includes various online technology tools that enable people to communicate easily and share information. Social media includes text, audio, video, images, podcasts, and other multimedia communications.” This site lists, and links to, 55 free apps in categories including: Analytics and Search Tools, Blogs and microblogs, Bookmarking/Sharing, Display of Multimedia, Data, Maps, Document Sharing on Websites, Idea Generation/General Discussion, In-depth Discussion Tools, Social Networks, Video, Photo, Audio Hosting/Sharing, and Wikis.