Voxopolis. Send anonymous feedback to anyone with an email address. The developers are clearly hoping that it’ll be used as a force for good, to improve customer service and the like, but cynics may say that it’ll just encourage the trolls. The sign up is a little cumbersome, but overall it all seems to work as advertised. This could be an easier option than setting up a temporary Hushmail account if you fancy a bit of whistleblowing action.

 VOXopolis aims to allow individuals to anonymously give feedback to anyone anywhere in the world as long as they have their recipient’s email address or other personal contact information. Its most specific applications would be to help improve the products and service of small businesses, professionals (doctors, dentists, accountants, etc.), government agencies, schools, non-profit organizations and corporations.