Harm Millaard had posted this list of "favorite tools" in the PrPro Forum. These might be of great use.
Noel Carboni offered this utility in the PS forum. I have never used it, so cannot vouch for how well it works.
there is a handy little free tool for actually doing good, reliable searches (though perhaps with a user interface that's a big geeky). It's Stefan Kueng's grepwin tool:
If you put the right stuff in the right places in its dialog, It will find what you're searching for - quickly and every time, even if encoded in Unicode. It even tells you the things it cannot search in (for example because the file is open), so there's no way you can unknowingly miss anything. Stefan definitely knows what he's doing.