Rainbow Board is a graphic and design tool that can be a great alternative for the widely-known MS Paint utility. Just like the mentioned basic design app, this open-source whiteboard software enables you to do simple doodling as much as you want. Most of the functions, features, and instruments it provides are easy-to-understand. Unfortunately, glitches from time-to-time can destroy your experience.

User-friendly interface with basic tools

Graphic utilities like Rainbow Board usually aims to cater all type of users regardless of their technical experience. You can expect an intuitive GUI that will allow users to effortlessly grasp the operation of this program even those with little to no computer knowledge. To access the main screen, you will only need to click the 'Start New' button. You will then be prompted to a large white blank canvas where you can freely doodle.

The toolbar can be seen at the bottom of your screen and the first tool displayed in the row is the brush. This is actually the equipment you'll use for freehand drawing. By utilizing the slider at the top of your screen, it will allow you to adjust the size of your brushes. If in the process, you've made a mistake you can just easily hit the 'Left arrow' button to undo the previous action.    

You can immediately redo it also through the 'Right arrow' button if ever you changed your mind. The second essential utility presented in your toolbar is the eraser which will enable you to delete the unwanted portion in your project. You can utilize the straight-line instrument for making geometrical shapes. However, it doesn't contain circular elements, unfortunately. All of the doodles you've worked on this app will be saved as a PNG image.

Simplicity at its finest

Rainbow Board's purpose is to give out an easily accessible drawing software solution that prides itself in providing the simplest graphic design features and tools. This way, most types of users will be able to make use of this program no matter how high or low their technical knowledge. It is not highly-advanced like professional-grade whiteboard tools out there moreover, it is flawed with glitches. Nevertheless, it sufficient enough to make up for your basic designing needs.