Packages automating the data collection, charting and analytical functions of statistical process control.
http://www.datalyzer.com/
DAG_Stat is an Excel spreadsheet that calculates a wide range of statistics (and confidence intervals) for assessing the performance of diagnostic tests and the inter-rater reliability of dichotomous ratings.
http://www.mhri.edu.au/biostats/DAG_Stat
Statistical software for ground-water and environmental detection, compliance, assessment and remediation monitoring.
http://www.dsi-software.com/
Exploration and Analysis of Data for students.
http://www.keypress.com/fathom/
Links to material and computer programs by Donald Macnaughton about computing sums of squares in unbalanced analysis of variance.
http://www.matstat.com/ss/
Program for biomedical research. Includes free trial.
http://www.medcalc.be/
A statistical analysis package for research synthesis. Free trial download.
http://www.meta-analysis.com/
Free stats software for Linux and Windows released under the GPL with emphasis on ease of use.
http://salstat.sunsite.dk/