A new web app developed by software engineer Waldo Bronchart makes remembering shortcuts to popular software like Photoshop and Lightroom a breeze. He's calling it 'Application Shortcut Mapper
Using drop down boxes, your keyboard, or mouse you can see all of the shortcuts available for a particular program. So far the software available is Photoshop, Lightroom, and Blender. Learning shortcuts is invaluable as it will speed up your workflow saving precious time, and if it's a paid job -- money! It's available in both Windows or Mac OS operating systems.
Check it out here