Many solid recommendations already in this thread.
A few things not mentioned enough:
Matrix as decentralized, secure messenger
Mastodon as decentralized Twitter alternative
Passbolt and KeepassX as open source password manager alternatives
Vivaldi if you want a Chrome based browser, LibreWolf for Firefox based
Filen and Syncthing for cloud storage & syncing (only read about both, have not tried them yet)
Floccus to keep bookmarks in sync
VeryCrypt for encrypting volumes in file containers (good support on all operating systems), if you are only on Linux LUKS/ext4 will do. Not FOSS but love Cryptomator for keeping encrypted files stored in cloud storage (as it does not create a single large volume but each file encrypted separately which is ideal for cloud storage)
FreeTube as desktop YouTube interface, NewPipe and Tubular on Android (saw another -Pipe mention in the thread too... there are many similar alternative interfaces)
Many solid recommendations already in this thread.
A few things not mentioned enough:
Matrix as decentralized, secure messenger
Mastodon as decentralized Twitter alternative
Passbolt and KeepassX as open source password manager alternatives
Vivaldi if you want a Chrome based browser, LibreWolf for Firefox based
Filen and Syncthing for cloud storage & syncing (only read about both, have not tried them yet)
Floccus to keep bookmarks in sync
VeryCrypt for encrypting volumes in file containers (good support on all operating systems), if you are only on Linux LUKS/ext4 will do. Not FOSS but love Cryptomator for keeping encrypted files stored in cloud storage (as it does not create a single large volume but each file encrypted separately which is ideal for cloud storage)
FreeTube as desktop YouTube interface, NewPipe and Tubular on Android (saw another -Pipe mention in the thread too... there are many similar alternative interfaces)