My lines.love is just klunky. I started out thinking about geometric construction, so it only allows labeling points. My hack has been to label the top-left point to put text inside a box. There are no smarts yet to compute whether text is inside or outside a shape.
Mostly it's been good enough to be barely legible for the sorts of things I draw, given how infrequently I feel the need to draw. But I'm sure that's idiosyncratic to just me and nobody else.