| Name | Lines of code | Maintainability | Test coverage |
| lib/maruku/helpers.rb | 112 | A 35 mins | |
| docs/exd/exd.rb | 113 | A 35 mins | |
| lib/maruku/toc.rb | 114 | A 2 hrs | |
| lib/maruku/input_textile2/t2_parser.rb | 119 | B 5 hrs | |
| lib/maruku/input/parse_doc.rb | 128 | C 1 day | |
| lib/maruku/ext/math/to_html.rb | 131 | A 2 hrs | |
| lib/maruku/output/to_markdown.rb | 160 | B 5 hrs | |
| lib/maruku/html.rb | 172 | C 1 day | |
| lib/maruku/input/html_helper.rb | 185 | D 1 day | |
| lib/maruku/input/charsource.rb | 204 | A 3 hrs | |
| lib/maruku/output/to_latex.rb | 355 | C 1 day | |
| lib/maruku/input/parse_block.rb | 564 | F 6 days | |
| lib/maruku/output/to_html.rb | 576 | D 2 days | |
| lib/maruku/input/parse_span.rb | 596 | F 1 wk | |
| lib/maruku/output/s5/fancy.rb | 655 | A 0 mins |