Haystack PIM preliminary release available
A preliminary release of Haystack, MIT's "uinversal information client" is available for download. As a very ambitious project, it relies heavily on RDF and Semantic Web ideas. Possibly kind of overkill for single person personal use, it looks very interesting for organizations and teams. If you are interested in Clevercactus or Mitch Karpor's Chandler, Haystack is something to have a look at.