Source (link to git-repo or to original if based on someone elses unmodified work): https://sourceforge.net/p/molsketch/git/ci/master/tree/
2D molecular editing tool.
Its goal is to help you draw molecules quick and easily.
Of course you're creation can be exported afterwards in high quality in a number of vector and bitmap formats.
NOTE: This is only to provide appimages, I am not the developer.