Calendar plugin?

Does anybody know of a good date picking calendar plugin or anything that I can use for a WP sidebar? I don’t want a popup one that appears when you click on a field or an image…I need one that’s there…always visible…

Like this…

I’ve been looking for quite some time and can’t find a suitable one…

WordPress has a built in calendar widget, you would just need to style it a bit to get it to look like your attachment.