Ask HN: Are there any web-apps aimed at e-readers?

It would be great (for me at least) to be able to do several common activities on my Kindle. The main motivator is that I find it hard to sleep if I've been looking at screens late at night. For example, I'd love to be able to use some kind of messaging client.

I was never able to get Kindle Active Content (the closest thing there was to an app store) as I'm not US-based and that seems to be disappearing anyway.

Which means the only available option is using web-apps. Of course, the obvious problem is that they're totally unoptimised for e-ink screens where scrolling, colour and movement are all either poorly implemented or not available at all.

Are there any web-apps designed to work well with e-readers?