Free Software

Trial Versions

Trial versions for all VSH products are available on product pages. Choose the product from the Software menu to download its trial version.

GemStone™ Reader

GemStone™ Reader allows anyone to read GemStone™ files without using a license. It comes with a 30 day free trial of the full version of GemStone™.

ModFit LT™ Rule-Based Training System

This add-on for ModFit LT™ is designed to improve operator-to-operator and lab-to-lab consistency by defining a set of rules to guide DNA cell-cycle analysis. It comes complete with a PDF user guide, training files, and proficiency testing.


TestDNA is a utility that generates FCS histograms of cell cycle data with known component values.  Using its batch mode you can generate thousands of histogram files with the click of a button.

Flow Cytometer Simulator

This application provides a simulation of a working flow cytometer.  It was developed to illustrate issues with color compensation, but also provides insight into many other attributes of flow cytometers.

FCS File Mixer

This application provides allows you to merge 2 or more FCS listmode files into a new, "mixed" file. Revised 11-Jul-2012.