Glyphicons released a pretty huge update, and Hubstream has incorporated it into the product. While they still do update, the glyphicons site is the best reference.
Glyphicons has a classic set which we do still use. Here is a link to a decent reference.
What if I’m missing icons
As icons are updated, you might notice the reference sites having more icons than what Hubstream has available. Submit a ticket to email@example.com