santander.com.br – Site Banco Santander
bb.com.br – Site Banco do Brasil – Banco Online
hsbc.com.br – Site HSBC Brasil – Banco Online
itau.com.br – Site Banco Itaú – Banco Online
bradesco.com.br – Site Banco Bradesco – Banco Online (also bradesconetempresa.com.br)
Here, the corporate site gives access to the online banking in most banks.