Distributed Proofreaders provides a web-based method to ease the conversion of Public Domain books into e-books. By dividing the workload into individual pages, many volunteers can work on a book at the same time, which significantly speeds up the creation process.
The Philatelic Digital Library Project was conceived to work closely to the Project Gutenberg Distributed Proofreaders and the Project Gutenberg to create, organize and preserve a philatelic literature collection.