Help with WordPress Plugins?

Greetings!

I am significantly new in the area and thus am experiencing some problems. Basically, what I want to do is develop a plugin, whihc combines the following features.

Voting/rating comments, along with viewing thresholds.
I would also like to add votes for anons and if possible for it to be server-friendly.

I have located some Wrdpress plugins, but so far to no avail. Help is very much appreciated.