I just particularly like the design of this one we did where I work and thought I'd share it. It's a local hockey organization's informational website. It's not too crazy functionality wise, just a few custom page templates and a little events module.
The only plugins that really do anything are widget logic and gravity forms. Though the events portion of this site is a pretty small part of it (on this page, doesn't even link to the full events archive.. just shows upcoming 3 and goes to an outside site per client's request), I actually ended up creating a nice little CPT to handle the date stuff that I plan to use a lot and share. I hardly worked on this - a coworker designed it and another themed most of it except the events.
I've got my company on board to use Hybrid Core for almost all development going forward, so I'm excited to show you guys some more stuff later on!