The InSITE (Integrase Swappable In Vivo Targeting Element) system consists of a collection of GAL4 enhancer trap insertions that allow for conversion of the GAL4 into lexA, QF, or a number of other transcriptional regulators using simple genetic crosses. For more information on swaps and available "donor" cassettes, go to the InSITE donor cassette page.
The InSITE system is described in Gohl et al. (2011).
You can find descriptions and images of the GAL4 expression patterns exhibited by these lines at the InSITE database website.
*Associated gene - transgene may be inserted into the gene or the gene may lie 5' or 3' of the transgene.