Browsers (916 programs)

Pros: Find out who friended and unfriended you. Free to use.

Cons: Contains ads. Busy servers make it slow to load.

Pros: Alerts you when your webpage goes offline. Supports HTTP or pings. No installation required.

Cons: Doesn't offer any advanced webpage admin features. Can only give a limited reading of what happened during an error.

Pros: Very easy to use. Works with any search field.

Cons: Nothing really important.