I guess open source applications is the second category UX forgot, just like enterprise aqpplications. Crypto apps for example.
“Ultimately, that’s what makes UX in open source content management such a daunting task. The limitless, unpredictable variance in use cases, combined with an ever-increasing demand for multi-language, “easy to understand” interfaces is difficult to keep up with.”
(Blake Callens a.k.a. @blakecallens ~ OpenSource.com) ★