Interesting tidbit from their about page "Day Software has been a leading force in the open source community. Day Chief Scientist Roy Fielding was co-founder of the Apache Software Foundation, author of the Apache Software license, and creator of the Apache web server." - Roy Fielding also being the PhD behind REST

Wow didn't know this..

Day Software also contributes to a variety of Apache projects, such as "Jackrabbit".

Wow that is big news. I hope they don't hollow out the company to just get the people and the ideas behind the product. it's great (but has also some caveats).

Their Nosql idea has too great possibilitys.

And of course as stated by Kris they use lots of opensource in their Product.

Thomas Mueller, the guy behind H2, an all-Java open source RDBMS, also works for Jackrabbit.