SPSS - This is the software company that the produces the Windows based statistical analysis software supported in Educational Psychology courses.
SAS - A leader in statistical software for Windows and mainframe computers.
The following university sites provide many useful links and resources for statistics including online resources and data sets.
Arizona State University - This site provides a number of useful resources including online demonstrations of statistical concepts.
Some other good sites for stats:
Clay
Helberg's Site - Lots of good resources and many, many
links on this site maintained by an SPSS statistician.
Online Analysis of Data - A list of online demonstrations compiled by Gene Glass at ASU.