So, where can I find all useful plugins?
And, what plugins do you find useful.

look at stuph link in top of this forum or search google for ollydbg plugins

basically only one plugin viz commandline that comes along by default is more than enough for many many situation

but if you are deeep into some unpacking ollydump should be a good addition

apart from that all others are just addons that you would need once in your life time on some odd situations

but grab them all and keep it stashed so you dont have to loook far ahead when in need