Crowdsourcing is also done by the 'distributed proofreaders' subproject of Project Gutenberg. It is an uncomfortable fact though that many 'DP' projects run agr

Crowdsourcing is also done by the 'distributed proofreaders' subproject of Project Gutenberg. It is an uncomfortable fact though that many 'DP' projects run aground without actually seeing a Project Gutenberg release, due to the lack of people who are willing to push the projects through and especially to 'post-process' them, i.e. take the proof-read and marked-up pages and actually create a final HTML e-book from them. (This shows up on the site as a sizeable 'post-processing backlog' which is unlikely to be even partially addressed in the foreseeable future.) But as long as someone is willing to do the hard part of the job, 'DP' can also work quite well!