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

Wazuh - Open Source Host and Endpoint Security

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

Beats - Beats is the platform for single-purpose data shippers that is installed as lightweight agents and send data to machines to Logstash or Elasticsearch.

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.

Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.