VirusTotal is a web-based malware detection service that utilizes various antivirus engines and internet scanners to analyze potentially harmful files and URLs. It allows users to check for infections missed by their antivirus software and verify false positives with the help of different contributors.

Hybrid-Analysis.com is a free malware analysis service that uses cutting-edge technology to identify and analyze malware threats. It integrates CrowdStrike Falcon’s machine learning, reputation lookups, antivirus engines, and static analysis tools to provide comprehensive threat analysis, with the ability to submit files for static and dynamic examination.

Clam AntiVirus (ClamAV) is a free, open-source antivirus toolkit designed for UNIX systems. It offers virus and malware detection tools, mainly focusing on email server scanning. The toolkit includes a command-line scanner, automatic updates, and a scalable daemon that supports multi-threading.

VirSCAN.org is a free online service that scans files for malware using multiple antivirus engines. Users can upload files for scanning and review the results to determine if they are safe, although it does not guarantee that viruses won't infiltrate a system.

NoDistribute is an online tool that scans files for viruses without sharing the results. Using VirusCheckMate’s antivirus programs, it ensures file scan results remain private and secure.

Jotti's Malware Scanner is a free service that allows you to check files for malware using multiple antivirus engines. You can upload up to five files at a time. While the service utilizes several antivirus programs, it's important to remember that no security tool can guarantee 100% protection. Antivirus companies collaborate by sharing files to improve the accuracy of their detection systems.

IObit Malware Fighter is a comprehensive security and privacy solution designed to protect users from cyber threats like ransomware and viruses. It works alongside existing antivirus software and includes virus protection in its paid version, which integrates Bitdefender’s engine for enhanced security.

MetaDefender is a cybersecurity tool focused on protecting businesses from threats hidden in data from multiple sources. It helps companies create long-term strategies to safeguard their critical infrastructure from cyberattacks and minimize potential impacts.

AntiScan.me is an online virus scanning service that checks files and directories for malware. It uses an API from DynCheck to scan files, URLs, and webpages, ensuring that personal information is kept confidential during the process.