Teleauto 2.XX
Software able to perform the following tasks: automatical observation; LX200 and FS2 compatible telescope's control; Hisis 22 14 bits, Hisis 22 12 bits, Audine, ST7 and ST8 camera's control; all other cameras control; automatic focusing; image treatment; sealings and domes control.
Additional plug-in and catalogue files available in the homepage. See the screenshot.

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. See a screenshot.

Vision Pro 1.XX
"A dedicated software for image processing and control of DTA CCD cameras.
Has a complete geometrical run: there are commands like duplicate, resize, rotate, dilate/contract, rescale, flip and many others; it is also available an image editor which allows to modify the single pixel.
There are many display modes: several commands of stretching, but the most interesting one is a new transfer function to do the image contrast, that can be defined by the user by several parameters. The palette command is also fully editable and definable by the user. It is also possible to display the spectral analysis, and to create animations.
The menu for image processing comprises a wide range of convolution filters; apart of the standard high-pass and low-pass, unfocussed mask, gaussian and averages, the user can also try the innovative ones as non-linear and adapters. It is also possible, through a sub-menu user filter, to create own personal filters.
One of the most important characteristics of Vision Pro is the possibility of several algorithms of deconvolution, very useful to recover part of the resolution lost in the image, due to many reasons as optical aberration, defocusing, tracking error etc...
The software uses the FFT application and other particular filters as the high-emphasis, to evidence the weak areas without to saturate the stronger ones; also homorphic is very useful to devignetting images where it was not possible to apply the flat-field.
For expertise users, it is available the IPBL language, very similar to Basic, designed to satisfy any particular needings as the elaboration of a sequences of images."
A few optional files more are available in its homepage, such as test/demo pictures, an Italian manual etc... See a screenshot.

Iris 3.X.X
"Iris offers numerous and powerful functions of image processing in the field of the digital astronomical images; and is particularly optimized to exploit the images that come from CCD cameras. Iris can load and save images in the formats FITS, PIC or BMP; and can read also the images of the Buil-Thouvenot Atlas, a CD-ROM which contains 4649 images of 6600 objects of the deep sky.
From the Command window you can execute numerous commands in on-line mode. These commands are a subset of the commands available in the DOS-32 bits software QMiPS32. The on-line mode of Iris is extremely practical, notably to make repetitive operations.
Finally, Iris possesses functions helping the Audine CCD camera."
The program is available in English (linked here) and French. See a screenshot.

AVIS - FITS viewer
Opens FITS files and 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 greytones TIFF and TGA files; saves FITS and allows easy and fast modifications of the FITS Header; exports files: as TXT format, RAW, TIF, TGA, BMP and JPEG; supports WCS (World Coordinates System) and custom palettes. On-line help: full documentation and introduction to FITS format. See a screenshot.

CCD
Based on your selection of CCD cameras, telescopes and camera lens (easily added or selected from lists including the most popular) it will calculate field of view, pixel coverage, effective focal lengths, focal ratio, size of chip, approximate size of object on the chip etc...
By the Astronomical Society of Southern New England. See a screenshot.

Image Tool 3
Image processing and analysing software. Very complex. Highly recommendable. See a screenshot.

Registax
Registax is a tool for alignment, stacking and processing of BMP or AVI image sequences. See a screenshot.

Stellar Magic
«Stellar Magic is a freeware image processing program for astronomical images in FITS and Windows bitmap format. Stellar Magic provides a host of convolution filters as well as FFT operations and sophisticated deconvolution procedures for manipulating images. It also performs image registration and mosaic creation in addition to standard operations such as dark frame subtraction and flat-fielding. Although Stellar Magic is primarily a greyscale image processor, it can create and manipulate colored images using either RGB or LRGB techniques, and can convert CMY images to RGB.»
See the screenshot.

Astrometrica
«Astrometrica is a interactive software tool for scientific grade astrometric data reduction of CCD images. The current version for Windows is the successor of a DOS based software that was used for astrometric data reduction of photographic films.
Features include: Reads FITS (8, 16 and 32 bit integer files) and SBIG image files; Automatic image calibration (Dark Frame and Flat Field correction); Blinking with automatic image alignment; Zoom and 'Magnifying Glass' for closeup image inspection; Automatic reference star identification; Automatic moving object detection and identification; 'Track and Stack' function to follow fast or very faint moving objects; Access to the complete MPC database of orbital elements (MPCOrb); Includes Internet access (e-mail, ftp); Online help system and tutorials.»
See the screenshot.

Utility Astrofotografiche
Set of four utilities. Written in Italian. 1) ST4-calc: CCD program; 2) FOCAL-calc: for photography with telescope; 3) ASTRO-calc: for solar system objects exposure calculations; 4) ECLIPSE-calc: for Sun photography. See a screenshot.

WinMiPS 1.5c
Program designed to control the Hi-SIS camera, and offer also some basic image processing functions. See a screenshot.

Other freeware programs in this category (links to the homepages)

AstroStack (image enhancement)

QCV2 - Quickcam Capture Program

Astrophotography - Free Software

Sumador FITTS (in Spanish)

Six CCD and FITS applications (in Spanish)