Osketch 1.3.7 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. This Mac app was originally designed by Zhang Guangjian. The application is categorized as Design & Photo Tools.
From the developer:
Osketch is a vector graphic design tool. It's lightweight, easy to use, and powerful. Osketch has many modern features. In Osketch, you can use any graphic as a mask, fill a shape with multiple modes, layout texts on a path... Osketch makes it easier to construct attractive graphics, such as icons, logos, app UI, etc.
You may want to check out more software for Mac, such as 3D Image Commander, UnCoverIt or TurboCAD Mac Designer, which might be related to Osketch.