Answer

It is a commercial Internet forum software package written in the PHP programming language.

Discourse is a simple, flat forum, where replies flow down the page in a line. Replies are attached to the bottom and top of each post, so you can optionally expand the context of the conversation – without breaking your flow.

Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.

It is designed to help teams inform, discuss, and make decisions at scale. For leaders at every level of a company, it is a platform for work that best delivers on decision making by tapping into the collective wisdom of an entire team, providing everyone with a voice to assure better business outcomes.

It is a modern community platform designed to live as an organic part of your existing website or product. Now you can easily create an engaged discussion space wherever your users already are - no more siloed external platforms or legacy forums!

Easily add sections. Create questions and answer them on the fly. Drag and drop and move things around. Edit everything in a flash.