DeepSkyStacker is a freeware for astrophotographers that simplifies all the pre-processing steps of deep sky pictures.
Cost / License
- Free
- Proprietary
Platforms
- Windows


Apps similar to Siril include DeepSkyStacker, which is free. Other options are FITS Liberator, SAOImageDS9, Regim and PixInsight. You can choose from more than 10 apps like Siril for Windows, Linux, Mac and the web.
DeepSkyStacker is a freeware for astrophotographers that simplifies all the pre-processing steps of deep sky pictures.


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 is an advanced image processing platform specialized in astrophotography and other technical imaging fields, constantly pushing the boundaries of astronomical image processing with the most powerful toolset available.

Star Trail Stacker is a browser-based astrophotography workspace that turns exposure sequences into star trails, fixed-ground nightscapes, deep-sky images, comet composites, planetary stacks and calibration masters.



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





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


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.
