Comment Quoting?

Hi all,

I’m currently adding the finishing touches to my wordpress theme, however the “comments” function for replying to a blog post is relatively simple (I’m using the equilibrium theme)

Does anyone know of a plug-in/widget that allows me to QUOTE a posters comment, and then reply back to it without leaving the actual blog article? I’ve tried to find something similar but just keep getting useless “quote of the day” type plug-in’s/widgets, which is not what I’m after!

Can anyone help? Thank you!