Alternatives to BlockBlock

Monitors and reports any microphone and camera activity

App to protect against process injection

Stand alone ad blocker

Analysis tool for security research and malware triage

Monitors computer mic and webcam

Host-based application firewall

System monitor for the menu bar

Open-source firewall to block unknown outgoing connections

Network monitor

Network monitor and firewall

Monitor process activity

Tool to show what is persistently installed on the computer