"Unsinkable - Why we can't let go of the Titanic," by Daniel Mendelsohn in The New Yorker. Excellent synthesis of the events with particular emphasis on Walter Lord's definitive book on the Titanic, "A Night To Remember."
One Hundred Years Later: A Snapshop of Life on the Titanic from Time Lightbox
Encyclopedia Titanica – Encyclopedia Titanica bills itself as "the foremost repository of facts, opinion and media relating to RMS Titanic. Featuring Titanic survivor stories, comprehensive Titanic passenger list and biographies, detailed Titanic research articles, in depth discussions and rich media including Titanic pictures, archive recordings and the Titanic movie player."
Two new Titanic books share passengers' story from USA Today