 Leo (text editor)

Leo (Leonine Editor with Outlines) is an open-source text editor/outliner that features clones (virtual copies of outline nodes) as its central tool of organization, navigation, customization and scripting.Leo can manipulate text or code in any human or computer programming language (e.g., Python, C, C++, Java), as Leo is a language-independent or "adaptable LPE" (literate programming environment).