Signal/Session/SimpleX

Tangled.sh (github alt.)

Whtwnd.com (medium alt.)

Leaflet.pub (substack alt.)

Rocksky.app (last.fm alt.)

Popfeed.social (letterboxd alt.)

Paperbnd (goodread alt.)

Scrapboard.org (pinterest alt.)

Bluecast.app (twt space alt.)

Frontpage.fyi (hackernews alt.)

Nooki.me (reddit alt.)

Stream.place (twitch alt.)

Smoke Signal (eventbrite alt.)

Mastodon.social

Bluesky 101

Labs (soon!)