QuickCalibrate is a small application I wrote to help speed up the process of calibrating (darking & flatting) large numbers of images using Maxim DL.
QuickCalibrate allows you to define darks and flats, as well as images requiring calibration. You can select multiple darks and flats, using the median if you elect to. Once you hit "Calibrate!" Maxim DL is launched, the calibration files are read, and then each image requiring calibration is read in turn and calibrated.
Note that many facilities use median flats by defining the data images (the images requiring calibration) as the flat field images, and selecting "use median." If there are a sufficient number of images, Maxim creates a very nice flat field based on the median of the data images.
You can download the executable only, which is what I recommend, as it should run in almost any environment that includes Maxim DL. It is 9k in size.
If you have problems, you can try downloading a full installer with all dependencies. Since this is 1.6 megabytes, you really should try the Exe-only distrubution above first.