I have been using KoS for my own passwords for a while now, but somehow there have always been minor glitches that kept me from making a public release here on SF. Now with version 0.4 there are currently no known bugs (Testers! I need testers!! ;) ) and I finally decided to release it.
Also I have updated most dependencies to the latest versions (Hibernate 4, Spring 3.1, Wicket 1.5,..) and split the project into several modules as a preparation towards building a web service and mobile client(s) around KoS.
KoS has been my little personal pet project so far. Recently it has reached a stage where it's seeing some actual production use by myself. It works stable but is still lacking features and a nicely styled UI. This Sunday I will import the code to the SF subversion repository. A pre-compiled binary version, some docs on how to get it up and running and a list of planned features are also on the way.