The only software I know is "Braillesoft". Here you can view a resume of what this software can do: http://www.virtualeduca.info/ponencias2013/295/PonenciaBrailleSoft.doc
Yes there is a Braille translation software like Duxbury. There are some websites also that can convert text to Braille. However, we also need a Braille embosser apart from the software.