I want to know what my kids are posting; there have been problems in their communities. They need to understand that anyone, at some point, can see what they put on the Internet. I've told them: the monitoring software is to teach them to think before they type. But the best- rated programs are for Windows! Anyone suggest easy-to-use, reliable keylogger for OSX?
I know a friend uses BackTrack to ensure he won't lose any work due to unexpected quits and so on, maybe it's something for you?
http://web.me.com/wmodesitt/BackTrack/Main.html
I recommend: parenting
This is one of those times where you need to man up (or whatever the female equivalent is) and take responsibility for your offspring, rather than attempt to offload your responsibility to someone or something else (e.g., invading your kids privacy via dodgy software).
This sort of thing will only make your kid(s) rebel - rather than logging what your kids are doing, supervise them and talk to them about your concerns.
Bravo. A concept that seems to be lost these days.
Whilst trust is indeed an important factor in letting your kids mature, this is not always enough. And since all kids are individuals even in the womb, different kids need different parenting.
Feeling you need a key logger to monitor your kid's internet activity could just as well be a positive thing as it could be negative. It lets the kid use the computer without having a parent present, and if he or she handles it without doing anything wrong, the key logger will never come up to discussion.
Also, a key logger could just as well be useful to protect them from groomers, discover that they're being bullied, that they're having suicidal thoughts or whatnot.
If you wouldn't let your kids go down town, to the mall or whatever on their own, then why would you let them be by themselves on the internet which could be a much scarier place? Imagine your eleven year old daughter is constantly hanging around anorexia pages, or suicide forums. Wouldn't you want to know? These are not things that prove they haven't had enough parenting, or bad parenting, just that they're in need of help.
Stop being so damn judgmental, we have no idea what kind of kids the OP has, and not monitoring what your kids are doing online might just as well be more harmful than doing so.