URLscan.io - urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.

Sandboxie - Sandboxie is a program for Windows that is designed to allow the user to isolate individual programs on the hard drive.

Joe Sandbox - Automated Malware Analysis - Development and Licensing of Automated Malware Analysis Tools to Fight Malware

AbuseIPDB - AbuseIPDB is an IP address blacklist for webmasters and sysadmins to report IP addresses engaging in abusive behavior on their networks, or check the report history of any IP.

MalShare - MalShare is a public malware repository providing access to malware samples that have been reported by users.

CyberGordon - Aggregator of cyber reputation checks with more than 30 engines (threat intel sources)