If I understand what you're looking for, GTK. If it's a linux desktop, there's a super high chance that GTK is both installed and familiar to the user.
However...
This would make vendors write more gui software for Linux
What makes you think vendors want the native look and feel?
Even on Windows, there's a long history of apps wanting to feel "unique". That's what they want: full customization to fit their branding.
Comments
If I understand what you're looking for, GTK. If it's a linux desktop, there's a super high chance that GTK is both installed and familiar to the user.
However...
What makes you think vendors want the native look and feel?
Even on Windows, there's a long history of apps wanting to feel "unique". That's what they want: full customization to fit their branding.