Paint S 7.16.2 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Yong Chen.
The program lies within Design & Photo Tools, more precisely Viewers & Editors. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Paint S is an easy-to-use drawing tool and image editor which can help you to draw pictures and edit your existing photos. With it you can sketch and crop, rotate, scale images very easily. At the same time, you can add text onto images as you want. The app also supports layers, so you can re-edit them freely. Paint S is the free version of Paint Pro. It has some limitations. Please upgrade it to enable all functions if you think it is useful.
You may want to check out more Mac applications, such as Pro Paint for Mac, Paint it! or Kids Paint, which might be related to Paint S.