VPMN (Virtual Private Mesh Network) for server-less VPN.
It's distributed as P2P and uses DTLS.
Abandoned Google Notebook
GNU GPLv3 with OpenSSL special exception
The binaries of this program includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. The OpenSSL Toolkit includes cryptographic software written by Eric Young and also includes software written by Tim Hudson.