AquiferWin32 Aquifer Analysis Software - Windows compliant application for analysis and presentation of aquifer tests including pumping test, slug test and step tests. - http://www.aquiferanalysis.com/
Aquifer Tests Software, Inc. - Software for graphical aquifer analysis using the Theis, Cooper-Jacob, Moench, Hantush, Neumann, and Hvorslev analysis methods. - http://www.aquifer-test.com/