Yeah, it's plugging a product, but a product I love.
I love WindowBlinds. It's my most used program along with Firefox. It makes my PC so much nicer to use, with the custom themes being a major plus. It's very easy to use, and I love how it makes my PC look. It's worth trying, if nothing else. It helps, however, if you have an idea of what you want. It also has a lot of skins available.