Well, any way it occured to me that a Signature tool would be very cool.
First you'd launch Signature Designer where you would make and save a signature. This signature could also have meta data attached and even a watermark IN the signature itself.
Later you just click some option and a dialog box pops up asking which signature to use and where. You could set it up so that it's always the same and automatically appears on your work or whatever.
Sometimes I do sketch work and forget to sign it and put it out there before catching it. Bad habbit I know. But that lead me to this idea.
Now I suppose I should have kept this idea to myself and developed a plug-in but I'll never get around to that so anyone who wants can go for it. Uh, just send me a copy for free. (I use Painter 8.1)