This is an “unofficial” conversion of the Leptonica documentation. While the owner of that website, Dan Bloomberg, provides a link to this website, he hasn’t yet verified the accuracy of the conversion.
Among the differences are:
A collapsible table of contents sidebar that allows easy navigation throughout the entire website from any page.
A Leptonica API page and pages summarizing the contents of the /src and /prog directories. These all feature sortable and filterable tables with hyperlinks to the Doxygen-generated Leptonica API Reference Documentation for all source files and functions.
An easier to read, slightly reorganized README with full hyperlinking.
An easier to read Version Notes page.
The entire site can be downloaded for local use from: http://github.com/tpgit/UnOfficialLeptDocs/archives/gh-pages.
Problems with the documentation should be reported at: http://code.google.com/p/leptonica/issues/list.