[dcrazy]

> Do you know a cross-platform app (Windows, Mac, and Linux) that has many millions of users and is implemented natively on each of these platforms (Gtk, Qt, Cocoa, Win32 etc., respectively), not with JavaScript? I can't think of any.

If you consider Mac and Windows sufficiently cross-platform, any of the major Adobe apps.

[benbucksch]

> If you consider Mac and Windows sufficiently cross-platform

No, that would make using the Linux desktop impossible, if you need that app.

[ho_schi]

Gimp. Inkscape. Wireshark. Just to name Gtk and Qt examples of relevant applications.