Nerd Boyfriend delivers the best parts of two Tumblr staples: fashion and nostalgia. Blogger Roxana Altamirano provides retro (and occasionally current) photographs of fashion-savvy celebrities, plus suggestions on how to dress like them today. Sure, the site claims to honor nerdy style, but the fashion is as hipster-friendly as it gets. (And yes, there is a fledgling counterpart called Nerd Girlfriend.)