These are from high Domain Authority websites, which makes them some of the best free backlinks to build for websites.

While some of these links are nofollow links that nevertheless help your site's backlink profile, some are dofollow links that pass the highest PageRank value for SEO.

https://www.papaly.com/

http://www.memotoo.com/

https://www.exchangle.com/

https://www.sitejot.com/

https://pixelfed.social/

https://atavi.com/

https://booky.io/

https://github.com/

https://sites.google.com/