UGENE - UGENE is free open-source cross-platform bioinformatics software
BioEdit - Biological sequence alignment editor
Geneious - Geneious combines all the major DNA and protein sequence analysis tools into one revolutionary...
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.
TreeView X - TreeView X is an open source program to display phylogenetic trees.
DNADynamo - DNA analysis, cloning and sequencing software