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.

BioEdit - Biological sequence alignment editor

Open Vector Editor Electron - A simple file based genbank/fasta file viewer and editor. Works with mac/windows/linux

UGENE - UGENE is free open-source cross-platform bioinformatics software

Mendelgen - Plasmid editing simplified. Quickly optimize codons, align sequences, simulate digestions, and more.

Chromas - Two software applications are available from Technelysium: Chromas and ChromasPro.