BPM GPL

http://www.softwareforenterprise.us/2009/03/13/list-of-top-open-source-bpm-workflow-solution/

http://www.processmaker.com/es
http://wiki.processmaker.com/index.php/Main_Page
http://www.processmaker.com/product-tutorials
http://www.processmakerblog.com/processmaker/processmaker-version-2-0-45-released/
http://www.processmakerblog.com/how-to/how-to-define-a-custom-default-language-in-processmaker/

http://es.bonitasoft.com/