Acronis Drive Monitor will work and is free. I use this, it's really good. However, like all of these things, it's only as good as the signal route - IE, a bad cable may cause false positives etc so if you can also test the cable you will have the extra reassurance (and of course then the port on the motherboard! Although normally, the results are pretty accurate I just wanted to point out it could be something else.)
Acronis Drive Monitor: Estimate health percentage, and use Windows Event Log events (which may be related to risk of data loss). Can trigger automatic backup on S.M.A.R.T. alert when combined with Acronis backup software.
Wikipedia also gives you an overview of such S.M.A.R.T tools (too much to copy across).