Android: Getting to your favourite apps or Android's system settings isn't difficult, but Floating Touch gives you a persistent, on-screen button (that you can drag around) to tap with a quick access wheel packed with shortcuts, utilities, apps and more. It's like Facebook's Chat Heads, except it's actually useful.
The video above actually does a great job of walking you through Floating Touch's features. You get a persistent button that you can drag out of the way. When you tap it, it centres itself on-screen and opens a wheel with your chosen settings and shortcuts in it. Tapping an option can take you deeper into a menu, so tapping settings will bring up individual settings options instead of just taking you to the menu. From there you can toggle Wi-Fi or data, tweak the volume and so on. With apps, you can add specific app shortcuts to quickly launch things like navigation or your dialler from anywhere in the system.
If you don't like the button sticking around on screen, you can hide it in the notifications bar and bring it back when you want it. The free version lets you customise all eight buttons, but the pro version lets you add layers, so you get wheels within wheels you can tweak to your heart's content. Hit the link below to grab the free version.