JD|Java Decompiler is one of the best decompiler I have used. Visit them here.
This can be used as a stand alone application as well as an eclipse plugin. This works like achieve application in case of of jar files.
The site url to be used is http://java.decompiler.free.fr/jd-eclipse/update
Need help in installing it in MyEclipse?. Download the word(docx) file here.
Give it a shot.
