http://911digitalarchive.org/
This may have been posted before, but with the 5 year anniversary approaching, I thought I would share it.
The September 11 Digital Archive is a still-growing archive launched in January 2002 with the aim of collecting 1,000 stories. Now there are more than 150,000 pieces of history uploaded to the online collection of photos, stories, e-mails, video clips and animations