As it's Aaron Swartz day, you might want to follow one of the projects he created...
SecureDrop is a free open source secure system for whistleblowers to contact journalists anonymously through @torproject. Their official account is at:
SecureDrop is used by major news organisations and NGOs around the world to receive tips.
Their website is at https://securedrop.org
A newer server operated by the Mastodon gGmbH non-profit