OK, then a replacement Home Launcher is what you're looking for. There are a few good ones listed earlier in the thread. Apex and Nova are the popular ones for 4.0 and up. If you're into that sort of thing, they're kind of competing for the top spot right now (like the browser wars from the nineties), so it's always cool to watch devs compete by adding features or upping performance. It's a great time to be on the Android platform.