If you're using Android on some phone or tablet and you're not using #fdroid yet, do yourself a favor and install it.
It's an alternative appstore with purely OSS software apps. Overall improved security and privacy on your mobile device (alternative apps for pretty much everything are available, with reduced tracking, no ads, no backdoors, reproducible builds, and so on).
Also follow @fdroidorg while you're at it.
@maigonis @fdroidorg Yep, if you additionally also run LineageOS or other cutom ROMs without Google Play services (like I do) some things like push notifications won't work since they require Google stuff. I'm in the lucky position that I don't need many of those apps, though. The only one is Signal really, and luckily they have a custom APK on their website which works without Google Play services.
Fosstodon is a Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.