ZEM - Zeden's Editor of Molecules
Reads/Writes over 80 chemical formats thanks to Openbabel.
Forcefield for structure cleaning and minimisation.
Fully integrated with Zodiac.
Saves as .svg, .bmp, .png, .jpg.
Scans graphics files for molecules thanks to OSRA.
Cross-platform: released for windows, linux and macosx.
Open source, released under the GPL.