SpinSpotter calculates stellar rotation periods from high-cadence photometry. The code uses the autocorrelation function (ACF) to identify stellar rotation periods up to one-third the observational baseline of the data. SpinSpotter includes diagnostic tools that describe features in the ACF and allows tuning of the tolerance with which to accept a period detection.

DIA (Delta function Difference Imaging Code) provides a difference image analysis pipeline that employs a delta-function kernel; this is useful for reducing TESS Full Frame Images. DIA's scripts are available in both Python and IDL and are nearly identical in their outputs. Together, the scripts make a pipeline that cleans and aligns images, generates a master frame by combining all available images, performs image subtraction, generates light curves, and does a basic detrending to the light curves based on magnitude. DIA can also apply bias subtraction, flat fielding, background subtraction and align images to the first image in the list.