My friend and I both have Samsung Galaxy Rugby Pro (SGH-I547) on Android 4.1.2, both fully updated OS and software.
His phone has a bottom right and left page curl effect accessed with a swipe from bottom left or right corners. This will reveal recent apps, swipe again and it reveals favorites, swipe again and it reveals tools.
I can't for the life of me figure out what app or setting makes this happen. I can't even find an image on Google to show you what I mean.