- Email Encryption – GPG – http://www.gnupg.org/
- Windows – http://gpg4win.org/
- Mac – https://gpgtools.org/
- Linux – Install seahorse from your package manager
- OTR Chat – http://www.cypherpunks.ca/otr/
- Signal messaging – https://whispersystems.org/
- TOR Browsing – https://www.torproject.org/
- F-Droid – https://f-droid.org/
- BitCoin – https://bitcoin.org/en/choose-your-wallet
- Disk encryption
- Winndows – BitLocker built in or VeraCrypt https://veracrypt.codeplex.com/
- Mac – built in
- Linux – built in (LUKS)