ChemDraw is described as 'Communication suite for managing, reporting and presenting Chemistry research. Produce precise chemical structures with our premier chemical drawing solution' and is an app in the education & reference category. There are more than 10 alternatives to ChemDraw for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best ChemDraw alternative is Chemaxon Marvin, which is free. Other great apps like ChemDraw are ChemDoodle, ACD/ChemSketch, MedChem Designer and JChemPaint.
The Gnome Chemistry Utils include six chemistry related programs:
Cool Chemistry Tool - educational app for Students. Chemist will help you in chemical tasks! Use the Periodic Table just like a computer keyboard. With the Chemist you will learn everything you need to know about the elements, compounds and chemical reactions.
MollyCule is a completely free Open Source Chemistry visualisation program for MacOS, Linux and Windows. MollyCule is designed to be a nice, easy to use program to help ordinary people who want to explore Chemistry.
ChemApp is a powerful tool that will help you to solve everything from the simplest to the most complex of chemistry problems - from balancing chemical reactions and finding molar masses to solving reaction stoichiometry problems.
speciolab is a modern yet easy-to-use chemical drawing software that is aimed at helping students, companies and other users to draw clean and orderly chemical structures for reports, theses and presentations.
ChemStitch is a web-native chemical structure editor for chemists — academic researchers, graduate students, postdocs, and industry chemists in pharma, biotech, contract research, and chemical manufacturing.
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ChemDraw is specifically intended for drawing chemical structures to include in documents, presentations and beyond. Chemik is specifically not intended for that and therefore can't be a replacement. (Also, the Chemik website has an explainer Youtube video which is blocked in Denmark on copyright grounds - very useful!)