LuLu – In today’s connected world, it is rare to find an application or piece of malware that doesn’t talk to a remote server. LuLu is the free, open firewall for Macs that can protect your network connections and detect malicious activity.

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.

Source: Objective-See