KoolCal is a small portable calendar, although we should almost qualify it as a mini-calendar because of its size and basic functionality, clearly betting on simplicity.
We can click individually on each day of the calendar, and insert notes or notes for reminder. So that we can distinguish them better, the days that have an associated note will appear in a different color.
Through the right mouse button we will access the context menu, where we can change the image of the program or activate the option 'Always on top' so that its window always appears in the foreground.
You can free download KoolCal 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.