Software · Utilities & files

Sly

Sly is a photo editing program, available on Linux.

Completely free
Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-3.0+ — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Flathub, Official plan pages (pricing, licence, terms)
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: LinuxEstablished by Linux: Flathub
Publisher: kramo
Latest version: 1.1.2 (25 August 2026)
Latest activity: 21 October 2026
Source code: git.kramo.page/sly

At a glance

All of Sly is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

A friendly image editor that requires no internet connection or preexisting expertise. Just some photos and have at it. The app allows you to adjust attributes like brightness or contrast as well as add effects like a vignette or a border. It also allows you to flip, rotate and crop the image to your heart's desire. If you're a pro, you can even preview your edits on a histogram. When you're done, just save the photo with the quality settings of your choosing. You also get a choice in whether or not to keep metadata such as location information.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 8 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 8 November 2026
Last technical check: 7 November 2026
Description from Flathub — AppStream (Flathub)

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