JDK hidden treasures

Couple of tools we occasionally use but knowing them is useful esp. when we want to peek into JVM.

jps  -List the java process running.
eg: jps -m -l

jvisualvm - Visualize all the VMS running. Seems to be a better option than jconsole. Comes with jdk1.6+ i think
http://java.sun.com/javase/6/docs/technotes/guides/visualvm/intro.html

jconsole -
eg: TODO: remotely manage Mbeans??

jar
eg: jar xvf --to extract, jar cvf -- to create ?

jarsigner  --useful for signing applets.
jstack --??

java  - The jvm ...
javac  - The compiler

javaw  - As far as I know useful to run a process without sticking it to the console which is opening it. eg: javaw eclipse