Is there a package that compresses multiple declarations, tidies up my overall css, and removes capitalization all in one?

[snugglebats]

As the title says, is there anything that does all of this all in one? If not, what individual programs do.
For example, I want to turn code that looks like this:

.Cat{ 
background:RED;
Background:blue;}

into this:

.cat {
background:blue;
}