Free OS X Security Tools
KnockKnock
"KnockKnock... Who's There?" See what's persistently installed on your Mac. KnockKnock uncovers persistently installed software in order to generically reveal malware.
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TaskExplorer
TaskExplorer allows one to visually explore all running tasks (processes). Quickly see a task's signature status, loaded dylibs, open files, network connection, and much more.
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BlockBlock (beta)
BlockBlock provides continual protection by monitoring persistence locations. Any new persistent component will trigger a BlockBlock alert, allowing malicious items be blocked.
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RansomWhere?
By continually monitoring the file-system for the creation of encrypted files by suspicious processes, RansomWhere? aims to protect your personal files, generically stopping ransomware in its tracks.
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OverSight
Mac malware often spies on users by recording audio and video sessions...sometimes in an undetected manner. OverSight monitors a mac's mic and webcam, alerting the user when the internal mic is activated, or whenever a process accesses the webcam.
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Lockdown
Lockdown is an open-source tool for El Capitan that audits and remediates security configuration settings.
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KextViewr
KextViewr displays all loaded kexts, along with their signing status, full path, VirusTotal detection ratios, and more.
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Ostiarius
Ostiarius is tool for El Capitan that blocks unsigned internet binaries from executing. Though OS X's Gatekeeper attempts provide this functionality, it's trivial to bypass.
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Dylib Hijack Scanner
Dylib hijack scanner or DHS, will scan your computer for applications that are either susceptible to dylib hijacking or have been hijacked.
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What's Your Sign
What's Your Sign adds a ^-click menu item to Finder.app. Click it to display the cryptopgraphic signing information about any file.
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