Best Apps MacMac App Store Download FreeBest Free Apps For MacSlack developer Felix Rieseberg has transformed Mac OS 8 into an app you can install on your Mac or PC. The app even includes classic games like Duke Nukem 3D and apps like Photoshop 3. Today is an easy-to-use event and task management application for Mac OS X Leopard. Built on top of the same data engine as Apple's iCal and Mail prog..