FITS Liberator - Image processing software to create color images using raw observations, which enables data to be processed from a wide range of telescopes and planetary probes.
Aperture Photometry Tool - Software for astronomical research, as well as for learning, visualizing and refining aperture-photometry analyses. Image overlays, graphical representations, statistics, models, options and controls for aperture-photometry calculations are brought together into a single package.
SalsaJ - Students and teachers can make the Universe their laboratory.
Registax - Used to stack images in astrophotography.
Eyes on the Solar System - "Eyes on the Solar System" is a 3-D environment full of real NASA mission data. Explore the cosmos from your computer. Hop on an asteroid. Fly with NASA's Voyager 2 spacecraft. See the entire solar system moving in real time. You control space and time.
Wings Over Mars - This exciting application places students in the role of Mission director who is controlling the ARES Mars Airplane from an Earth-bound control center.
Future Flight Design - In this program, you will become a NASA researcher and design the air transportation system of the future!
Open Universe - Real-time Solar System Simulator, simulates the major planets and moons in 3D on your computer.
K3CCDTools - Windows application dedicated for astro-imaging. It includes video-capturing (supporting wide range of video capture devices), auto-guiding and frame aligning and stacking / summing.
Cartes du Ciel - Enables you to draw sky charts, making use of the data in 16 catalogs of stars and nebulae. In addition the position of planets, asteroids and comets are shown.
Celestia - Space travel simulator. Additional stars, deep space, and solar system catalogs and images available as add in.
Blink Comparator - Lets you load sets of images, align them and play them as a movie.
Astro-Snap - A very comprehensive program for image capture, including long exposure control of modified Webcams
CCD - A useful freeware program from the Astronomical Society of Southern New England for determining image sizes on CCD chips.
Astro Photo - Program that calculates exposure times for Camera and CCD format
Lunar Occultation Workbench - This program computes occultations by the moon of eight planets and 54 thousand stars.