Bridgy - Bridgy pulls comments, likes, and reshares on social networks back to your web site. You can also use it to post to social networks - or comment, like, reshare, or even RSVP - from your own web site. https://brid.gy/

Friendica - Decentralisation - Privacy - Interoperability

Blog2Social - Auto post, cross post, re publish, re post and schedule your WordPress blogs posts to social networks like Facebook, Twitter, LinkedIn, Instagram, Pinterest

Scuttlebutt - A decent(ralised) secure gossip platform.

CodeRevolution - Automatic posting to different social networks using WordPress plugins.

Wordpress Ajax Marketing Slider - The Marketing Slider or the Affiliate Marketing Slider can display all your WooCommerce products and WordPress posts from one fully responsive Ajax slider, making it more fun and entertaining to surf or share your site's products from any device.