Simple Desktop Calendar

Simple Desktop Calendar is a tiny and straightforward app which displays a calendar on the top-right corner of your screen.
This is a portable application, so installing Simple Desktop Calendar is not necessary. This means that you can store the tool on a USB flash drive or any other removable device, save it to any computer, and directly run its executable file.
Therefore, you can always have Simple Desktop Calendar with you when you're on the go. What's more important is the fact that the Windows Registry is not updated with new entries, and no leftover files can be found on the hard drive after program removal.
The interface of the tool is based on a small frame. By default, the background is black, week days are written in white, while the weekend days are noted in blue. The current day is encircled in green.
However, these colors can be changed by accessing the 'Preferences' screen from the system tray area. All you have to do is select a spot on the frame and select a new color for it. Additionally, you can make Simple Desktop Calendar automatically run at system startup.
The lightweight utility doesn't put any strain on the computer's resources because it runs on a barely noticeable amount of CPU and system memory. It didn't cause the operating system to freeze, crash or pop up error dialogs during our tests.
On the other hand, it comes with limited features. For example, you cannot move Simple Desktop Calendar's frame to another spot on the screen. But we must keep in mind the fact that the tool has not been updated for a long time.