The Early Life of Abraham Lincoln by Ida M. Tarbell (1896): A 19th century history of Lincoln up until his 30th birthday, available in full, courtesy of Google Books.

Lincoln Bicentennial (1809-2009): Celebrate the 200th anniversary of Lincoln’s birth with writings on his life, educational material for children, timelines, a quiz, and booklists of the best Lincoln scholarship.

The Lincoln Institute: A forum for Lincoln scholars and enthusiasts that has articles on different aspects of his life.

The Collected Works of Abraham Lincoln: Published in 1953 by the Abraham Lincoln Association and now available in full online.

Lincoln as Poet: Lincoln occasionally wrote verse, and his poems are collected here.

Abraham Lincoln Historical Digitization Project: This resource presents historical materials from Abraham Lincoln's Illinois years (1830-1861), including images, maps, and video, as well as other materials illuminating antebellum Illinois.

Abraham Lincoln Newspaper Archive: An extensive collection of newspaper articles about Lincoln written during his lifetime.

Abraham Lincoln’s Crossroads: Play the Lincoln video game that allows you to make the hard choices Lincoln faced in politics. Appropriate for ages 10 and up.

Assassination of President Abraham Lincoln: The Library of Congress’s webpage on the assassination that includes a timeline and an image gallery.