Joe Sandbox
RiskIQ Community
Software || Cisco Talos Intelligence Group
A variety of cyber security tools, ranging from network protection and analysis, to scripts that restore files which have been compromised by specific malware, to tools to help security analysts research various threats, all which are free to download and use.
VX Vault
Projecthoneypot.org
A free, distributed, open-source project to help website administrators track, stop, and prosecute spam harvesters stealing email addresses from their sites.