Daler Karimov
Daler Karimov reviewedDiscourseA platform for community discussion. Free, open and simple.
 RecommendedPros: 

Robust and modern FOSS forum engine.

Great core team and friendly community.

Powerful full-text search, good plugins and easy to customize.

Cons: 

Currently cannot:

- assign moderators and staff per-category;

- let login with phone # (i.e. without email) out of the box.

Happy using it for my projects:

Eve.QA - easy and expressive Q&As for events.

Oprium.com - a place to share and discover exciting opportunities.

Apteka.TJ - forum on health, beauty and family well-being.

Daler Karimov has used this product for one year.