Keka
Open and make zip, 7z, rar and other archives
What it does
Drag files onto Keka to compress them, or open almost any archive format. It can also split big files and add passwords.
Who it’s for
Mac users who receive odd archive formats or send large files.
Why it’s cool
Free on the website, paid on the App Store if you want to chip in. A friendly little cat icon too.