A social skin built around the timeline: members follow each other, and the home page is the activity of the community.
Skin: jrFollowMe2, version 2.0.7 in the Marketplace.
Install it from the Marketplace (ACP > Marketplace), then activate it: ACP > Skins > (skin) > Info > Set As Active Skin. See Changing the Site Skin. Its settings are on the skin's Global Config tab. It needs Timeline (jrAction) 2.5.0 or newer.
The skin shows sections for these modules when they're installed: Timeline, Followers, Audio, Video, Image Galleries, Like It, Comments, Groups, Group Discussions, Group Pages, Polls, Playlists, Forum, Flickr. Without a module, its sections don't show.