Text/graphics editor for UV-image editor

I often see myself working with very simple objects that would be finished in like 10 minutes, but the only thing that stops me doing it so fast is that I need to open my textures in some other program to make the texts, numbers, and markings correctly.

So what I think would make this much faster is to have a simple text/graphics editor inside of the UV image editor. We already can paint there, so I think it would be just fine to also have the ability to write text, change font, color and rotate those made up elements.

I don't know if it's too much to ask, but some Pen Tool kind of feature would also be nice. That might need a native support for some layered files to be used as textures.