Key-mon is described as 'Utility to show live keyboard and mouse status for teaching and screencasts' and is an app in the Education & Reference category. There are six alternatives to Key-mon for Windows, Linux and Mac. The best alternative is Carnac, which is both free and Open Source. Other great apps like Key-mon are Screenkey (Free, Open Source), Kling (Free, Open Source), Screenflick (Paid) and KeyPress OSD (Freemium).
A utility to show keyboard keys visually on the Windows screen. - KaustubhPatange/Kling Visually display keys on Windows screen Detect multiple keys and key holds Allow you to change location of display Allow you to change amount of display time
Screenflick features high performance screen capturing for smooth, fluid motion up to 60 fps. Screenflick can record any portion of the screen, simultaneously recording audio from internal or external microphones and the system audio.
KeyPress OSD is a full-featured screencasting tool for displaying key-presses on Windows. Beyond on-screen keypress display, it features text-expansion, mouse-highlighting and a multi-clipboard manager.