AsciiDoctor - A fast, open source text processor and publishing toolchain, written in Ruby, for converting AsciiDoc

Asciidoctor is a fast, open source, Ruby-based text processor for parsing AsciiDoc into a document model and converting it to output formats such as HTML 5, DocBook 5, manual pages, PDF, EPUB 3, and other formats. Asciidoctor also has an ecosystem of extensions, converters, build plugins, and tools to help you author and publish content written in AsciiDoc.

AsciiDoc is the language, Asciidoctor is the processor. Asciidoctor reads the AsciiDoc source and converts it to publishable formats, such as HTML 5 and other publishing formats.