Game UI Database by Edd Coates - A crowdsourced database of UI reference images from hundreds of video games.

Library of Juggling by libraryofjuggling - An archived guide to juggling tricks and instructions for learners.

Walkman.Land by Walkman.Land - A web encyclopedia of all walkman models

Vintage Calculators Web Museum by Nigel Tout - A celebration of the evolution of the calculator

all text in NYC by Yufeng Zhao - Searchable database of all text found in Google street view images of NYC.

Grateful Dead Fan Art Archive by UC Santa Cruz - Over 14,000 illustrated envelopes sent in to the Grateful Dead ticket service 1983-1996.

Satellite Collections by Jenny O'Dell - Collections of like-objects found in satellite images.