data.world - The social network for data people
Planetary - Decentralized social media by and for the people.
Swarmia - Swarmia is an engineering productivity software trusted by 600+ engineering teams worldwide. Use key engineering metrics to unblock the flow, align engineering with business objectives, and drive continuous improvement.
Zyl - AI-powered photo app with a privacy by design approach
Whaller - Create your own free and unlimited private social networks.
Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!