Magento 5-Rappen-Rundung for Swiss Magento Merchants
After installing the extension, please log out of your Magento backend and re-login, the go to
System > Configuration > General > Currency Setup > 5 Rappen Rundung
in order to enable the extension and set the rounding to either "All prices and totals" (including invoices) or "Totals only".
Credits:
Thanks to Andreas von Studnitz (http://www.avs-webentwicklung.de) for providing the code basis and Michael Baer (http://www.codeag.ch) for sponsoring the extension.