DeepSkyStacker Alternatives

Siril is an astronomical image processing tool, able to convert, pre-process images, help aligning them automatically or manually, stack them and enhance final images.

FITS Liberator GUI image processing software has meant that it is even easier and faster to create color images using raw observations from a range of telescopes.

SAOImageDS9 is an astronomical imaging and data visualization application. DS9 supports FITS images and binary tables, multiple frame buffers, region manipulation, and many scale algorithms and colormaps.

PixInsight - Advanced Image Processing. PixInsight is a modular, open-architecture, portable image processing platform available for FreeBSD, Linux, Mac OS X and Windows.

Starry Landscape Stacker makes it possible to produce landscape photographs taken at night that have both low noise and stars rendered as points.

Regim makes some processing steps that are unique to astronomical images a bit easier. These steps are calibration (dark and flat), deblooming, registration, combination, color calibration, gradient removal and some more.

IRIS is an astronomical images processing software.

Fitswork is a windows image processing program, mainly designed for astronomic purposes. It contains batch processing, histogram functions, many filters, etc. Fitswork works entirely in floating-point arithmetic.

The Astro App is a tool for exploring the night sky and tracking celestial events. It's primarily targeted for amateur astrophotographers.

Sequator is a free software which can track stars on multiple images, align stars and stack them.

Astroart is a software for image processing, image analysis, astrometry, photometry, camera and telescope control.

Qastrocam is a capture program to do astrophotography. It can control a telescope to do guiding with the images received from a V4L device. It can also control the extended features of a webcam modified to do long exposure (several seconds) captures.