Check If Your Apps are Ready for OS X Mountain Lion Before Updating

One important thing before updating to a major new version of your computer's operating system is that you need to check if the apps you use everyday, the apps that you depend the most for your job, school, etc., are supported for the new OS, in this case OS X Mountain Lion.

There is an excellent resource to check this put and it is called RoaringApps. This site lets you check, not only Mac apps, but also iOS apps. 

Just search for those apps that you use to make sure you are safe before updating.