The main feature of GroupDocs.Editor is an ability to edit most popular document formats using front-end WYSIWYG editors without any additional applications. No Open Office or MS Office is required to edit Word Processing documents, Spreadsheets or Presentations....The main feature of GroupDocs.Editor is an ability to edit most popular document formats using front-end WYSIWYG editors without any additional applications. No Open Office or MS Office is required to edit Word Processing documents, Spreadsheets or Presentations.