Running multiple apps side-by-side is something that many users – especially those with tablets – have wanted on Android for a long time. And while we've seen a few implementations before (remember Cornerstone?), none have really taken off. Sure, Samsung has an option for multi-window on its more recent devices, but that's still a far-from-perfect solution, as it only allows certain apps to run together.
Given how oft-request/desired/lusted after this feature is, the devs behind the Paranoid Android ROM decided to try to bring it to life in a practical, usable way.
If you love the idea of the PIE controls found in Paranoid Android but can't bear the thought of parting with CyanogenMod, break out the champagne, because the two are to be wed today. That's right – PIE controls are coming to CyanogenMod 10.1.
For those who may not be familiar with Paranoid Android, PIE is a unique navigation method that essentially removes the stock nav bar and turns it into a floating control panel, much like the Quick Controls option in the now-defunct stock browser.
When it comes to custom ROMs, we generally stick to covering CyanogenMod and – more recently – AOKP. Every once in a while, though, something really special, unique, or just downright awesome shows up in another ROM. In this case, it's PIE. A ROM that can make pie. No, wait, that's not right. It's a feature baked into the Paranoid Android ROM that completely revamps the navigation area.
All pastry jokes aside, PIE is a fully-customizable replacement for the stock on-screen navigation buttons found in more recent versions of Android.