Sungear is a software system that supports a rapid, visually interactive and biologist-driven comparison of large data sets. The data sets can come from microarray experiments (e.g. genes induced in each experiment), from comparative genomics (e.g. genes present in each genome), or even from non-biological applications (e.g. demographics or baseball statistics). Access Sungear from the VirtualPlant site or try our demo version here. Sungear was developed at New York University.