However, as the GP notes the libraries must merely be "certifiable": You can do all the certification work yourself as long as it is possible with the libraries in question. Having access to the source code and the lack of non-determinism are two big requirements that come to mind.
[1] In fact you cannot even certify software only entire systems.
Sorry for the late reply.
Unfortunately, it looks like it's been static since 2010.
If I click through the links at the top of the page, there is no real indication of "staleness or non-staleness," until you get to Open-DO Conference, which has material from 2010 presented as if it's new. Then, the next link ("Forge") has "Latest News" from 2010.
Update: I did not even realize there was a blog, because you linked me to open-do.org/about/ instead of just open-do.org. There is no evident link to see a blog, so the assumption of the website designers must be (perhaps unfortunately) that you always enter directly through open-do.org. It turns out that clicking the title graphic will take you there as well, but someone who is initially linked to the "about" page would never think to click on that.