Firewalls (2 programs)
Pros: Modern easy-to-use UI. Allows unlimited configurations. Extensive filtering options. Offers parental control and SafeSearch.
Cons: Limited queries for the free version.
Pros: Comes with 6 presets. Has Geo-IP based blocks. Simple drag and drop use. Inconspicuous.
Cons: Requires OS X 10.10 or higher. Prone to crashing.