Darden Studio
Even though it works like typical lightboxes, the lightbox at Darden Studio (example) feels different due to design choices the firm makes.

The loading screen has custom typography centered on a black bezel:

loading

And then check how using a non-browser typeface, including the x on the upper right, and the arrows in the lower right spice up the design of the lightbox itself.

lightbox

ShoeGuru
ShoeGuru makes shoe shopping elegant.

guru

Cymbolism
Cymbolism is a new website that attempts to quantify the association between colors and words. You can search for a word and see what colors people associate with it. The goal is to “make it simple for designers to choose the best colors for the desired emotional effect.” Here are the results for the word spring.

spring