A while back we reported that certain branches of the French government were switching their desktop email clients to Thunderbird.
One of these branches who switched to Thunderbird was the French military. However, in order for Thunderbird to fit their particular requirements, quite a few modifications were required.
Thanks to the openness of Thunderbird, the French military were able to develop extensions to address some of their needs and modified the source code to address core changes. But they didn’t stop there. Instead of just keeping their changes to themselves, they open sourced them. Then, together with Mozilla they bundled the add-ons with a Thunderbird and created their own fork, named Trustedbird. Kudos to the French military!