So.cl
So.cl was a social networking service and social search engine operated by Microsoft FUSE Labs. They announced on March 7, 2017 that it would be closing down So.cl on March 15, 2017.
Design
So.cl appeared similar to Google+ and borrowed concepts from Facebook, Twitter and Pinterest. It occupied a niche role and was intended to augment rather than replace those services. Users were able to post a collage of pictures pertaining to a specific topic and share it with friends or "followers". Users were also able to post visual comments under these posts by sending "riffs". Riffs were a separate collage of graphic media that relate to the topic of the post. By using riffs, users were able to communicate with other users with media that was related to their interests.Signup and login required a Microsoft account or So.cl-connected Facebook account. Registration was only open to users 18 and older.
The site had integrated search features using the Bing API. Searches were public by default, but could be marked private.
Users could follow other users or categorical interest pages. Users could share content they viewed on the Internet with other users by installing the So.cl's Bookmarklet application which added a “Share on So.cl” button to the browser's bookmark bar.
;Video Parties
Video Parties were collections of live YouTube video shared and edited by users.
;Following interests
Users could subscribe to Topic pages in order to populate their interest feeds.