Is There An App for That?

No, really, I’m asking: does anybody know of a simple, free (ish) niche app to create (writer’s promo)┬áimages like this one, which Louise G. White posted on twitter:

Screen Shot 2014-08-07 at 2.05.50 PM

Louise used Photoshop, which is awesome, the gold standard, and so forth, but fails both my requirements, being neither simple nor cheap.