This looks like Aseprite. Aseprite is already open source and you can get it for free, all completely legal. The only caveat is that you need to compile it yourself (which takes 2-5 shell commands). I think this is more than fair, but ripping off Aseprite is not so much. Their license also strictly prohibits that behavior.
Aseprite is source available nowadays, not open source. Libresprite was then forked off of the last commit of Aseprite before the license was changed from the GPL.
1. Asperite is not open source.
2. It’s okay for two projects to do the same thing, even if you personally prefer one over the other.
Aseprite is such a joy to use that I paid for it just to support the developers
didn't even realize Aseprite is source available!
I highly recommend paying for Aseprite, it's a very good little tool.
I think Libresprite is a fork of Aseprite from before it changed its license. In that context, maybe not a big deal.
The history section of the repo clears it up [0]
> LibreSprite originated as a fork of Aseprite, developed by David Capello. Aseprite used to be distributed under the GNU General Public License version 2, but was moved to a proprietary license on August 26th, 2016.
> This fork was made on the last commit covered by the GPL version 2 license, and is now developed independently of Aseprite.
Also I am not really sure if you can convince me that this is a open source license: https://github.com/aseprite/aseprite/blob/main/EULA.txt
Not that it is a unreasonable license, but it is not open source.
[0]: https://github.com/LibreSprite/LibreSprite?tab=readme-ov-fil...