calligra  3.1.0
About: Calligra Suite is an office application suite (requiring KDE and QT components). It contains applications for word processing, spreadsheets, presentation, vector graphics, data visualization, and project planning. Calligra uses the OpenDocument format but can import other formats, such as Microsoft Office formats.
  Fossies Dox: calligra-3.1.0.tar.xz  ("inofficial" and yet experimental doxygen-generated source code documentation)  

calligra Documentation