I've been trying my hand at LiveCode, and in a fit of whimsy decided to turn on online film error site into a desktop MacApp.

Easier than I thought it would be. You can download a version of it to try yourselves. The online version is there too.
http://www.worldofpaul.com/filmerror/

LiveCode can compile Linux and Windows versions too, but I've not tried that yet. LiveCode can do iOS apps too, but you need the pro version and an Apple dev account - a total outlay of around £400.

So, right now, it's desktop versions only, as that version of LiveCode is free, and I'm a cheapskate.