I'm quite impressed with your skill set. Have you tried Harmony http://harmony.apache.org/? There are plenty of development tasks: http://wiki.apache.org/harmony/TODO_List_for_DRLVM, http://wiki.apache.org/harmony/CoreVmDevelopmentItems, etc With best regards, Alexei Fedotov onkar wrote: > Can anyone suggest me a good project idea on jvm, garbage collection , > etc > I have knowledge of - > (1) C/C++ , lex,yacc > (2) x86 assembly > (3) Linux memory management > (4) jvm architecture > > > thank you,