This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
JProbe has a free trial period. It would probably be a good idea to try out the applications yourself to see if they are suitable for your particular environment. Don't forget jconsole which is packaged with J2SE 5 and newer.