Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
mdbook - Gitbook alternative in Rust
Rust - A safe, concurrent, practical language
MkDocs - Project documentation with Markdown.
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.