Library of Congress Virtual Volunteer: LOC needs people to transcribe, tag, & review documents.
Smithsonian Digital Volunteers: Transcription Center : the Smithsonian needs help making historical documents and biodiversity data more accessible.
National Archives: Citizen Archivist Program: NA needs help trasncribing, tagging, reviewing & commenting on historical documents to improve accessibility and searchability.
NYPL Community Oral History Project: NYPL needs help editing and polishing computer-generated transcripts of the Community Oral History Project.
Royal BC Museum: wants help transcribing their extensive collections.
Oregon State University: Index Letters. OSU needs help transcribing letters from the collection of Emergency Committee of Atomic Scientists in Post-War America.
SCRIPTO: Transcription Project: The War Department (1784-1800) of needs help transcribing George Mason Papers.
American Archive of Public Broadcasting: needs help "fixing computer-generated transcripts from thousands of historic public broadcasting programs from across the country."