From Kovach Computing Services:
Data Desk is a fast, easy-to-use data analysis package that has been helping people understand their data since 1986. Data Desk provides interactive tools for data analysis and display based on the concepts and philosophy of Exploratory Data Analysis. Data Desk implements many traditional statistics techniques suitable for data from planned experiments and sample surveys. However, the program's true strength is its powerful tools for data exploration. These tools simplify intuitive examination of your data. No special training in statistics is needed for these insightful graphic displays. When you explore your data with Data Desk, you will find patterns and relationships. But you will also bring to light the elements that don't fit often the most important discovery you can make about your data.