Social search

defunct free and open-source web search engine by Wikia

So.cl (pronounced "social") 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.

Yubo (formerly known as Yellow) is a French social networking platform and app developed by TWELVE APP in 2015. It is designed to "meet new people" and "create a sense of community". The app claims to have 85 million users as of 2025.

knowledge market