Apple’s next generation OS, Mac OS X 10.7, also known as Lion would launch in July. Lion introduces a host of new features including support for multi-touch gestures and a redesigned version of Mail. However, when you upgrading from Snow Leopard to Lion, there are chances of compatibility issues between app and the new OS.
If you are concerned more about the incompatibility issue, there is an online service called RoaringApps to rescue you by displaying what apps are compatible with the new OS Loin.
You’ll get more information and list of compatible/incompatible applications at here. [Via]