AppCleaner - AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps. Installing an application distributes many files throughout your System using space of your Hard Drive unnecessarily.

Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .

Revo Uninstaller - Free fully functional download of Revo Uninstaller Pro and Revo Uninstaller Freeware.

Panda Antivirus for Mac - A bare bones malware and anti-virus scanner.

Nektony App Cleaner & Uninstaller - Uninstall unneeded applications completely without any service files remaining. 🖥

Clam Xav (desktop) - Specifically with Clam Xav Sentry configured to scan inserted disks.Please read global comments on this question for an explanation of why desktop apps are being recommended for virus detection on ios devices.