Sophos Anti-virus - Protects your MAC from security attacks.

Believe it or not, for MOST users, this is sufficient protection, and the price is right!

Download it here: https://www.sophos.com/en-us/products/free-tools/sophos-antivirus-for-mac-home-edition.aspx

OnyX- Maintenance, Optimization and Personalization of your System .

Download it here: https://www.titanium-software.fr/en/index.html

Handbrake - The Open Source Video Transcoder.

Download it here: https://handbrake.fr/downloads.php