Software by Marshall Perrin

Marshall's Software

WebbPSF provides direct imaging and coronagraphic point spread function simulations for JWST

A FITS file mdimporter for Spotlight. Requires OS X 10.4, of course. Unzip the archive and see the README file for instructions. Warning: This is very rough alpha-quality code.
A Sidereal Clock for Mac OS X that I wrote. Now includes Dashboard widget!

My IDL software has its very own page.

This perl script, submit_prepare.pl, automates some tedious aspects of preparing submissions for ApJ or ArXiV.org (astro-ph), including compliance with ApJ filename rules and automatic re-compression of images to meet ArXiV's 1 MB file size limit.
Data reduction and exposure calculation code for IRCAL, the science camera for the Lick Observatory Adaptive Optics system, can be found at my IRCAL page.
Need to drive a Hawaii2 infrared detector using a Leach/ARC Generation II controller? Check out the software I wrote for our KERMIT camera.
I've recently started using Matthew Britton's excellent Arroyo AO simulation library. I've written up some notes on using Arroyo.

ljcrop is a lossless jpeg cropping tool for Linux. (Actually, it's a Tcl/TK GUI front-end for jpegtran.)