phpBB
phpBB is a free, open-source forum software written in PHP, designed for creating and managing online discussion boards. It provides features like user registration, posting, moderation, and customization through themes and extensions, making it a popular choice for community-driven websites. The software is widely used for building forums ranging from small hobbyist groups to large-scale communities.
Developers should learn phpBB when building or maintaining online forums, as it offers a robust, scalable solution with extensive community support and customization options. It's particularly useful for projects requiring user-generated content, community engagement, or integration with existing PHP-based websites, such as educational platforms, gaming communities, or support forums.