Here are some good options imo:

Wallets: Sparrow, Electrum

Node: Mynode over tor

Stacking Btc without kyc: on www.g2a.com search for Azteco bitcoin vouchers. Buy and redeem.

Encrypted messaging and file sharing: Matrix Element app.

Talking online to others in a secure way: Jitsi app.

I hope that this helps You. 😉