Freshmeat page: http://freshmeat.net/projects/jeffnotary/
A web-based digital notary service. Written in Python allows you to setup your own digital notary really quickly. It uses GPG for all signing.\
It's still pretty basic. Doesn't implement any of the fancier algoritms since they're patented.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!