Sly is a free and open source image editor for Linux, Windows, MacOS and Android. Using Sly you can change image brightness, contrast, exposure, blacks, whites, midtones, saturation, temperature, tint, noise reduction, sharpness, sepia, vignette, border. Some other useful features are flip, rotate and crop the image, histogram support and export the photo as a JPEG or a PNG.
Download Sly Image Editor [Linux, Windows, MacOS, Android]
Install Sly on Ubuntu
Download the latest Sly for Linux from the above download link. Right click on that downloaded file and select Extract. Now open the extracted folder and right click on sly program file and select Run to start it.
Install Sly via Flatpak:
You can also install Sly image editor via below flatpak install command.
flatpak install flathub page.kramo.Sly
And open Sly using below command.
flatpak run page.kramo.Sly
If you don’t have then first install flatpak and flathub on your system and restart it after the installation.