Since the beginning of computing, Tree controls have helped developers to structure, present and navigate data. It has become a natural and expected part of a wide variety of applications running on everything from your old PC to the latest smart phones. No matter if you just want to organize and display auntie Berta's knitting patterns on her iPhone or handle a million entries database, a Tree control is what you need - but why re-invent the wheel? rTree gives you a quick and easy way to include these essential navigation controls in your app.