I would pay, but I have a hard time figuring an application that I am currently missing. It is also not completely clear to me what you mean by "beautifully de

I would pay, but I have a hard time figuring an application that I am currently missing. It is also not completely clear to me what you mean by "beautifully designed". For instance, I run Ubuntu wih Gnome 3, and most (all?) of my applications are based on GTK+3. If you were to make an application that is very beautiful in itself, but is not written in GTK, it will stick out. This is going to make the application - in context - uglier than if it was GTK based. Now, if you use GTK, I think the application is going to look like all other GTK application, which nowadays is pretty nice. In short the answer is: yes, I would pay for an application that solves me a problem, but I may consider not buying it if it is made with a custom toolkit instead of GTK. EDIT: also, it has to be a one off payment, not recurrent, and I expect it to integrate with the OS (for instance, update by providing a PPA instead of running a custom updater)