Siril is an astronomical image processing tool.    Siril 1.2.6 was released Jan 22nd 2025

Siril 1.4.0 Beta 1 is available, released on April 26, 2025.

YouTuber  AstroOnBudget   Siril 1.4.0 Beta is LIVE and it's Incredible!

Courtesy of Pramod;  For the benefit of new users of Siril, here are the steps he follows:

- set home directory 

- crop image to remove peripheral issues 

- extract background & Denoise (I prefer using GraXpert)

- apply photometric calibration 

- Asinh stretch

- GHS stretches

- Remove green noise (optional)

- sharpen & Denoise (optional)

- save processed image