My roommate recently showed me this map of univariate distributions and I think it’s awesome. Here is a snapshot:
It visualizes the relationship between different univariate distributions. Admittedly, it is somewhat useless if you don’t know exactly what you’re doing before looking at it. So not sure this will be the first place where I look up stuff about distributions. They do have summaries for all distributions if you click on them, but these could probably use some more explanations for non-experts. Still, a really cool overview.