VisSPA 1.6.2 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free program is an intellectual property of SCRoftware. The most popular version of the program is 1.6. The program belongs to Education Tools. We recommend checking the downloaded files with any free antivirus. The most frequent installation filename for the program is: VisSPA.exe.
From the developer:
VisSPA is a user-friendly Windows program that accepts an alignment of sequences, interactively analyzes frequencies of residues at each position in groups of sequences and supports the generation of sequence logos. The frequency calculations and program name were initially inspired by VESPA
You may want to check out more software, such as CAEFEM, Quarter Mile Math Level 1 or Photometric Toolbox32, which might be related to VisSPA.