If I find an app, which is freeware but not Open Source software, is it enough to contact the developer per email to get the permission for creation of a portable app after the PortableApps.com standard?
New: MBox Viewer (Mar 22, 2026), Platform 30.3 (Mar 29, 2026)
1,400+ portable packages, 1.2 billion downloads
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Yes, so long as they give you permission and indicate such in your dev test post. Ie., a quote from their reply.