iOS (Jailbroken): Chromizer is a small tweak for the iPhone and iPad version of Chrome that adds a much-needed full-screen mode and a couple of other features.
The full-screen mode is especially nice on iPad. Tap with three fingers and Chrome will expand to take up the whole screen. Chromizer also adds a pull-to-refresh option for any page you're on. More interesting is the new tab-switching feature for the iPad version. Chromizer essentially brings the sliding finger switching of the iPhone version of Chrome to the iPad, and it works great. Chromizer isn't a huge tweak, but it works well and adds a few really nice features to Chrome. You can download it free from the ModMyi repository in Cydia.