Free Sequencer Viewer:

1. Software from ABI: Sequence Scanner Software v1.0
   The free Sequence Scanner Software enables you to view, edit, print and export sequence data generated using the Applied Biosystems Genetic Analyzers.

2. Chromas
   Chromas Ver. 1.45 is a free Windows application which displays and prints chromatogram files from ABI automated DNA sequencers, and Staden SCF files which the analysis programs for ALF, Li-Cor and Visible Genetics OpenGene sequencers can create.

3. 4Peaks (Mac Users)