onak is an OpenPGP compatible keyserver. It was originally written concentrating on providing real time path finding between 2 keys, but over time has moved to concentrating on providing standard keyserver storage and retrieval functionality.
The Monkeysphere project's goal is to extend OpenPGP's web of trust to new areas of the Internet to help us securely identify servers we connect to, as well as each other while we work online. The suite of Monkeysphere utilities provides a framework to transparently leverage the web of trust for authentication of TLS/SSL communications through the normal use of tools you are familiar with, such as your web browser0 or secure shell.