ImageJ - and Other Health Care
SnapGene Viewer - SnapGene offers the fastest and easiest way to plan, visualize, and document DNA cloning and PCR. You can easily annotate features and design primers.
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
UGENE - UGENE is free open-source cross-platform bioinformatics software
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.
DNADynamo - DNA analysis, cloning and sequencing software