They are not that popular, but still possible, take a look at these for example: https://www.macworld.co.uk/feature/mac-software/mac-viruses-malware-security-3668354/

By the way, the Unarchiever family of Apps is now part of MacPaw producst. So you should expect some nice updates in the nearers future: http://blog.macpaw.com/post/163484103673/macpaw-bought-unarchiver

You can now get some these Apps and some other great Apps on Setapp by Macpaw: https://setapp.com/apps 

Hi Thorin, thanks for the great post! :)