kobo.com sells books without DRM (under eBook details they tell you the exact format). For example, the murderbot chronicles are sold without. Sadly they don’t have everything like amazon does, especially for niche authors that only publish digitally.

As Phuntis said, curseforge is easily solved with prism launcher. They have a nice GUI to browse modpacks and set up everything automatically. For mods that don’t allow direct downloads over the API, they give you a browser link you can open and automatically pull the downloaded files from your download folder.

The launcher also has integration into modrinth and a bunch of other useful features. IMO the better launcher compared to the official one, even if you don’t play modded.