Can’t stop paging through this site. I’m blogging it just so I can bring myself to close the tab.
I work on CodePen! I'd highly suggest you have a PRO account on CodePen, as it buys you private Pens, media uploads, realtime collaboration, and more.
Get CodePen Pro
If you like books, you will like this site as well – http://bookshelfporn.com/ ?