Thanks to @Tutanota that I know about https://www.invidio.us/.
Tutanota made a blog about degoogling https://tutanota.com/blog/posts/how-to-leave-google-gmail/ by Matthias, the co-founder and developer of Tutanota.
Check it out, it's a good read.
Liberdon is a Mastodon instance for libertarians, ancaps, anarchists, voluntaryists, agorists, etc to sound off without fear of reprisal from jack or zuck. It was created in the wake of the Great Twitter Cullings of 2018, when a number of prominent libertarian accounts were suspended or banned.