Free, transparent programs I use and recommend.
Signal
Alternative to WhatsApp
TutaMail
Alternative to Gmail, Outlook...
Tor Browser
Secure web browser
Libre Wolf
Alternative to Google Chrome
Debian
Stable Linux OS with long-term support
EndeavourOS
Ready-to-use Arch distro (for experienced users)
Ufficio Zero
Italian OS based on Mint, stable and user friendly (for beginners)
PikaOS
Gaming OS, easy and user friendly, based on Debian Unstable (for beginners and experts)