“ACD/ ChemSketch” is a freeware that will enable you to draw chemical structures. You will be able to calculate the molecular weight, density, molar refractivity and so on, and name chemical structures that contain fewer than 50 atoms. Request the free license for personal and academic use at the link below (1 individual installation).
- Link to ACD/ Labs Website: https://www.acdlabs.com/resources/freeware/chemsketch/
- Images/video source: ACD/ Labs Website