TreeView - Tree drawing software for Apple Macintosh and Windows.
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
Clustal X - Multiple sequence alignment software.
UGENE - UGENE is free open-source cross-platform bioinformatics software
Clustal Omega - Produce alignments for multiple sequences