The OER Foundation offers many Free and Open Source Software services to our learners and educators to provide them with resources for learning, developing Open Educational Resources (OER), and collaborating - both professionally and socially - with one another. Due to this proliferation of 'point source' technologies, users have to create a myriad of user accounts, each requesting an email and password and perhaps a user name.
At the OERu we have two separate instances of market category leading Discourse Forum: one for OER partner and contributor collaborators and the other for learners. These days, online forums are seen as a bit old-school: fuddy-duddy. From my point of view, however, Discourse is "Forum-NG" (a Next Generation forum).