This site host diki - the distributed knowledge infrastructure. It is a friend-to-friend (p2p-like) based infrastructure that aims at providing a social semantic web without central servers. Thus it provides the privacy that most application still lack of.
Ok so what exactly Google Wave is can be confusing, because there are three parts: the protocol, the server, and the client. A lot of people are really going to miss the boat here if they don't keep the distinction between the three in mind, because I see a lot of people focusing on the wrong parts.
We are building an Open Source Jabber/XMPP solution. Our goal is to provide a complete environment for basic instant messaging use, stable and easy to extend for all variants of instant communication use cases.
Tapioca is a framework for Voice over IP (VoIP) and Instant Messaging (IM). Its main goal is to provide an easy way for developing and using VoIP and IM services in any kind of application.
Seems that most still believe Google Wave primarily uses XMPP to pass data around. Turns out, XMPP is only used for server to server federation. Joe Gregorio has a good overview of the actual APIs and protocols used in Wave, but I still found it easier to create a diagram
"the idea here is to associate both protocols so that they ... expand the audience of your network. It'd be easy to consider allowing people commenting to a blog entry using their XMPP client."
The Extensible Messaging and Presence Protocol (XMPP) is an open XML technology for real-time communication, which powers a wide range of applications including instant messaging, presence, media negotiation, whiteboarding, collaboration, lightweight midd
About XMPP The Extensible Messaging and Presence Protocol (XMPP) is an open technology for real-time communication, which powers a wide range of applications including instant messaging, presence, multi-party chat, voice and video calls, collaboration, lightweight middleware, content syndication, and generalized rou
OStatus lets people on different social networks follow each other. It's transparent to your friends, colleagues and family which software or service you use. They can get your status updates on their own sites and reply, like, or re-post your updates.
OStatus isn't a new protocol; it applies some great protocols in a natural and reasonable way to make distributed social networking possible.
M. Horng, M. Hung, Y. Chen, J. Pan, and W. Huang. Computer Information Systems and Industrial Management Applications (CISIM), 2010 International Conference on, page 487 -490. (October 2010)