My two cents:
- Plots are great, but please make them readable for the colourblind - use triangles/squares/etc in addition to circles, use lightness and saturation on top of hue. I can't make sense of the linked examples so far. - Code widgets are probably not that interesting outside of tutorial pages, but an online sandbox is fantastic for discussing short snippets of code. For example, play.golang.org is basically a runnable gist, and it is constantly used in online discussions like *how to do x* or *why doesn't y compile*?
