Looking for a keylogging type program and I need some help...please

I hope that the Security and Utilities section is an okay place to ask this, if not I'm sorry for any inconvenience.. (I had posted something similar to this in the general networking section, so I'm sorry if I shouldn't double post this.. I can take one of them down if I need to)

So my question: is there a program that can log internet activity, primarily the history and searches, that can simultaneously monitor multiple machines on a home network? (6 computers, to be exact). What I'm looking for is a way to 'simultaneously' send every machine a 'log' of internet activity; now it doesn't have to be in real time, but I'd like something I know will log. It would be great if it could also log general application usage as well, as in how much time an application is used, but that's not a necessity.

Anyway, I have spent an hour or two researching key logger's, most are the hidden (or cloaked) type used by parents for monitoring their kid's computer usage. I don't really care if it's not totally hidden, but it would be nice if it would log or notify when it was turned off.

Now something else I found to be pretty common is screen capturing, which I don't need, but I would like some sort of log that doesn't take to long to look through; something equivalent to the history browser of Firefox would suffice very well. And along with that the less cpu intensive the better.

And as far as price, I've looked at the freebies to the $2k Orion NPM Suite; now I sure don't need all the fancies with that of Orion, but it would be nice if it was under $50.

So there's my question, thanks for any and all input. And thank you for taking time to read this!