BioEdit - Biological sequence alignment editor
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.
UGENE - UGENE is free open-source cross-platform bioinformatics software
DNADynamo - DNA analysis, cloning and sequencing software
Genophore - Genophore is an application for searching and designing proteins. It also provides a suite of bioinformatics utilities.
Chromas - Two software applications are available from Technelysium: Chromas and ChromasPro.