Hi, I didn't look at the code yet but maybe it would be another good opportunity to test one of those code review tools? I don't know who manage this. About the interest, I've been using a not-as-generic-and-not-thread-safe solution that looks like your's but was still calling it a Singleton because of the lack of other word (and it does generate a lot of confusion in discussions on Singletons). So I'm interested to have this Singularity in boost. Doesn't Singularity means a lot more than the current context? I know the word only from hard science fiction and science related articles; and I'm not native english so maybe I don't know simpler meaning than in those contexts. Joël Lamotte PS : I just tried to get the source code and it seems my company firewall forbids the website. Can you expose it in github.com, bitbucket.com or code.google.com, or at least send it to me by mail, please? I'm sorry for the trouble, in last resort I'll get it once home this night.