TM4 is a suite of software tools that allow users in the laboratory to capture, manage, and analyze effectively data from DNA microarray experiments. The suite consists of four major applications, Microarray Data Manager (MADAM), Spotfinder, Microarray Data Analysis System (MIDAS), and Multiexperiment Viewer (MeV), as well as a Minimal Information About a Microarray Experiment (MIAME)-compliant MySQL database, all of which are freely available to the scientific research community at