StumbleUpon

Web surfers will soon have their last stumble. StumbleUpon is shutting down as the owners focus on a new discovery platform called Mix. StumbleUpon users can transfer their accounts over to Mix to save content, but after June 30, StumbleUpon will be gone. Mix takes a similar approach, but adds a swipe-based interface.

StumbleUpon has updated the relaunched site from 2011 with a refreshed design and new content discovery features.