What's a free alternative application to CandyBar?

I wanted to change my icons on my Mac and I found out that with CandyBar you can do so and more but the thing is I don’t have the money/want to pay $29.99 almost $30 for the application.

So I was wondering what’s a free alternative to CandyBar, I’ve googled searched this but they gave me results that I can’t even download. Such as iCustomize and LiteIcon are no longer available when I went to download them :/