The papers of FDR and Eleanor Roosevelt are now online at http://www.fdrlibrary.marist.edu/archives/collections/franklin/
“The official description: FRANKLIN is a virtual research room and digital repository that provides free and open access to the digitized collections of the Roosevelt Library—to everyone, anywhere in the world. Whether you are a lover of history, a student working on a school project, or a scholar, FRANKLIN allows you to keyword search for archival documents and photographs and to search, browse, and view whole files, just as you could if you came to the Library’s research room in-person. Now available online are some of the most important documents of the twentieth century – primary source documentation of Franklin and Eleanor Roosevelt’s experiences leading the nation through the Great Depression and World War II.”
It is still a work in progress with many sources yet to be digitized. But it is a great start and relatively easy to use.
You can even link to specific resources. Here is an example related to (my hero) Raoul Wallenberg: