...and one day it wished to update itself. Curious as to why such a simple app would need an update, I did a bit of research. My proxy server wouldn't even allow me to download it, having found something objectionable in the code. If you google it, you'll find several discussions as to what it tries to do, including browser hijacking. Needless to say, I immediately deleted that one.

I always tell my clients what the author says above: There's no such thing as "free". If the app isn't costing you anything to download and install, you have to assume that somebody somewhere is getting something in exchange.