Nebulosity
Nebulosity (Windows and OS X) is designed to be a powerful, but simple to use capture and processing application for a wide range of astronomy CCD cameras. Many cameras are supported for capture (see below) and images from just about anything can be processed (support for many FITS formats, PNG, TIFF, JPEG, CR2/CRW, etc). Its goal is to suit people ranging from the novice imager who wants to create his or her first images to the advanced imager who wants a convenient, flexible capture application for use in the field. In it, you get a host of purpose-built powerful tools to make the most out of your images (e.g., Digital Development Processing, traditional alignment/stacking (equatorial and alt-az), Drizzle alignment/stacking, Bad Pixel Mapping, LRGB tools, real-time tricolor histograms for color balancing, star tightening via edge detection, adaptive scaling of stacks, Canon CR2/CRW RAW Bayer matrix loading, 32/96-bit accuracy, etc.)
http://www.stark-labs.com/nebulosity.html - Details

MicroObservatory
• Optimize an image's brightness/contrast automatically, by either linear or logarithmic scaling. • Colorize images using several false color tables. • Invert an image's color table. • Increase image contrast and detail using "sharpen" filter. • Reduce the noise in an image. • Manipulate full screen magnification. • Show image information for individual pixels by cursor placement.
http://mo-www.harvard.edu/MicroObservatoryImage/ - Details

FitsX
FitsX is an astronomical image processing application that handles 32-bit FITS images. FitsX enables you to manipulate your astronomical images contained within FITS format files to extract the best possible image quality and to make precise scientific measurements.
http://www.coaa.co.uk/fitsx.htm - Details

REGISTAX
Free Image Processing Software The interface has been rebuild once more. We have removed the tabs on the rightside of the windows and extended the a controlbar with tabs (see Interface). Also the messagewindows now come in a different format and they can sometimes be used to set certain defaults. Batch-mode Operation RegiStax now can be operated also in a batchmode on AVI-files using a (currently limited) set of operators that allow you to align/optimize/stack and save the result. The command-list allows you to set: -filename to be processed -default directory -alignmentpoint X,Y (for single alignment) -alignmentpointfile (for multiple alignment) -first/last frame to process (block processing) -number of frames to be stacked -create reference (number of frames) -waveletsettings (filename) -autosave results (format) -autoexit after processing Added Input formats: Two sequential (multiple frames in a single file ) formats have been added both aiming at the output of Lumenera stylecamera’s: -16 bit (per channel) AVI format based on K3CCDtools format (Peter Katreniak) -16 bit (per channel) SER format based on LucamRecorder (Heiko Wilkens) Alignmentpage - 3 alignmentmethods (single, multi-point and none) - view full image (during alignment and during positioning of alignmentpoints) - user defined alignmentbox (draw an alignmentbox -single alignment around a feature) - option to “ignore” warnings (and frames) that are misaligned - allows you to define which messages (during alignment/optimisation) to show - predefined fits/tif image-stretching (usefull when datasets for instance do not span the full 16bits of a file makeing the preview look very dark) - automated detection of actual used “bitdepth” of imageformats (only for >8bits) to the nearest 2^n level
http://www.astronomie.be/registax/ - Details

Registax
Registax is a tool for alignment, stacking and processing of BMP or AVI image sequences.
http://aberrator.astronomy.net/registax/ - Details

Calcphot
Calculates exposure times for lunar and planetary photography; calculates the performances of a given scope; helps evaluating the quality of an observation spot.
http://astrosurf.com/lcorp/softphot.htm - Details

SkySight
Program for CCD camera control and astronomical image processing
http://www.southernstars.com/skysight/index.html - Details

PHD Guiding
PHD Guiding is designed to be "Push Here Dummy" simple, yet provide powerful, intelligent auto-guiding of your telescope for both PCs and Macs. Connect your mount, your camera, select a star, and start guiding. That's it! In PHD Guiding, all calibration is taken care of automatically. You do not need to tell it anything about the orientation of your camera, nor do you need to tell it anything about the image scale.
http://www.stark-labs.com/phdguiding.html - Details

Deep Sky Stacker
DeepSkyStacker is a freeware for astrophotographers that simplifies all the pre-processing steps of deep sky pictures.
http://deepskystacker.free.fr/english/index.html - Details

Astra Image
mage processing, sharpening, enhancement and analysis software
http://www.phasespace.com.au/ - Details

FITSBrowser
This program browses files in FITS-Format for quick view.
http://www.andrewulff.de/ - Details

GuideDog
Standalone Autoguiding for Webcams Dedicated, standalone, easy-to-use autoguider software Supports the SC-1 long-exposure webcam to allow guiding on faint stars Uses ASCOM for scope control to support many different telescopes/mounts Support for parallel port based relay boxes to connect to the CCD Guide Port of most mounts Sub-pixel guiding on a star centroid Audible alarm if lock on the guide star is lost
http://www.barkosoftware.com/GuideDog/ - Details

Fits4Win
A Windows Suite for viewing and inspecting FITS files from Explorer. Fits4Win supports 8, 16 and 32-bit integer and floating-point, mono and RGB FITS files under Windows 2000, XP and 98
http://astroshed.com/fits4win/fits4win.html - Details

AstroPhotography Exposure Calculator
Calculates exposures for pictures of celestial objects and the parameters of optical systems, especially the f-ratio, which is necessary for calculating exposures.
http://www.covingtoninnovations.com/astro/astrosoft.html - Details

Cadet
Image processing program, with special focus on astronomical image processing. It includes calibration, deconvolution (Maximum Entropy and Richardson-Lucy), Dr. Okano's Digital Development Process, colour combine, unsharp mask and many more!
http://www.terra.es/personal2/oscarcj/ - Details

Avis
Avis (Astro-vis) is a freeware FITS viewer for Windows 95, 98, 2000 and XP FITS files are used in scientific applications like astronomy and medical imaging. * Opens FITS files: (8 & 16 bit), supports multiple file opening and drag & drop from Explorer and other Windows shells. * Imports CCD files: like SBIG ST8, ST7, ST6, ST5, ST4, Starlight, Hisis, Pixcell and others. Imports graytones TIFF and TGA files. * Saves FITS and allows modifications of the FITS Header. * Exports files: as TXT format, RAW, TIF, TGA, BMP and JPEG. * On-line help: full documentation about Avis and about FITS file format.
http://www.sira.it/msb/avis.htm - Details

Dead Pixel Test
This free utility enables you to easily test your digital camera for dead and hot pixels.
http://www.starzen.com/imaging/deadpixeltest.htm - Details

Callipygian 3D
Callipygian 3D Photo Editing Software --a fast, easy way to generate full-color anaglyph (red/cyan and other modes) images from a pair of stereo images, as well as Holmes stereo cards. The software automatically handles images of different sizes, and lets you quickly and easily select a region of interest, position the stereo window, adjust a screen-resolution representation, and generate a full-resolution image.
http://www.callipygian.com/3D/ - Details

Teleauto
Software able to perform the following tasks: automatical observation;
http://www.teleauto.org/ - Details

Imagen - CCDC
Imagen is image acquisition software for old Starlight Xpress CCD cameras.
http://www.astroshed.com/imagen/imagen.htm - Details

AstroStack
AstroStack is a program that takes a series of images or a stream of video and combines them into one sharp noisefree picture. See examples. AstroStack is built on a flexible professional architecture with plugins. Works with all major operating systems (Windows, Linux and Macintosh OSX)!
http://www.astrostack.com/ - Details