Papilio Loader - Current Version 2.7 The Papilio Loader is a branch of xc3sprog (https://sourceforge.net/projects/xc3sprog/) that is used to load bit files to the Open Source Papilio FPGA boards (http://papilio.cc) made by Gadget Factory (http://www.gadgetfactory.net). WWW: http://papilio.cc/index.php?n=Papilio.PapilioLoaderV2