Library of Congress - Crowd (crowdsourcing transcriptions)
The Library of Congress has a beta crowdsourcing project happening - anyone can "[v]olunteer to uncover our shared history and make documents more searchable for everyone."
Currently, volunteers can help transcribe (digitize) five different campaigns: Branch Rickey: Changing the Game, Civil War Soldiers: Disabled But Not Disheartened, Clara Barton: Angel of the Battlefield, Letters to Lincoln, and Mary Church Terrell: Advocate for African Americans and Women. When you select a campaign, you will be able to see how much of the campaign is complete, how much is in progress, and the number of people contributing-
If you click into a campaign's items, you will see the individual pages along with a notation underneath it telling if it is complete, awaiting review, or still needs to be transcribed -
If you select a document/page, you see the scanned document on the left, and a window on the right where you can transcribe the writing on the page -