Plurk

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Subsocial

Pump.io is a general-purpose activity streams engine that can be used as a federated social networking protocol. With Pump.io almost anything can be represented with activity streams including  short or long text, bookmarks, images, video, audio, events, geo checkins. You can follow friends, create lists of people, and much more.

Minds is an alternative, blockchain-based social media platform. With Minds you can earn money or cryptocurrency for using the platform and interactive with other people. Tokens can be used to boost posts or crowdfund other users and their cause. Minds was to be a privacy-focused social network that is censorship resistant, and where users can interact without having their personal data harvested.

Gab is a free social network that champions free speech, individual liberty and the free flow of information online. All thoughts and ideas are welcome at Gab.

Steemit is a blockchain-based blogging platform and social media application that rewards its users with the cryptocurrency STEEM for publishing and curating content. On Steemit you can publish blog posts on any topic and get rewarded by doing so. You can also be rewarded by upvoting and curating post that the other users deems noteworthy.

Twetch is a blockchian-based social network. On Twetch, all interactions are micropayments in the form of Bitcoin BSV and the platform truley revolutionize social media interactions with its micropayments business model that does not include third-party actors taking shares off the payments. All of your content on Twetch is signed by you and stored on the blockchain, forever accessible to you.

PocketNet is truly decentralizer, open-sourced, content discovery and social media platform based on blockchain technology. The decentralized nature of PocketNet makes social media platform censorship-resistant and self-policed by users with good reputation where no corporation or individual records your keystrokes, viewing habits or searches.