nixpkgs / chemtool - Chemtool is a program for drawing organic molecules. It runs under the X Window System using the GTK widget set. Most operations in chemtool can be accomplished using the mouse - the first (usually the left) button is used to select or place things, the middle button modifies properties (e.g. reverses the direction of a bond), and the right button is used to delete objects. The program offers essentially unlimited undo/redo, two text fonts plus symbols, seven colors, drawing at several zoom scales, and square and hexagonal backdrop grids for easier alignment.
License - MIT
Maintainers - Anderson Torres