Extensions - OpenOffice.org Wiki OpenOffice.org Extensions OpenOffice.org offers the possibility to develop independent 3rd party extensions. The categories of extensions reach from Basic libraries, packages with Java/JavaScript or Python macros to more sophisticated extensions in form of UNO components implemented in Java, C++ or Python. Even the last category of extensions subdivide in general UNO components providing new implementations for existing functional areas or specialized components like Calc Add-Ins, Add-Ons, DataPilots, Chart Add-Ins or linguistic components (e.g. Spellchecker, Hyphenator or Thesaurus) add-onscompleteaddindeployementdevelopmentextensionextensions in Public bookmarkswith 3rdcategoriesdevelopextensionsindependentofferspartypossibility