It was written in PHP, supporting PHP4 and PHP5 and works with MySQL, MySQLi, PostgreSQL and SQLite.
Here are some key features of "FluxBB":
· Admin panel plugins
· Topic subscription
· Announcements
· Post preview
· Move topics
· Close topics
· Sticky topics
· Prune old topics
· Edit posts
· Delete posts
· BBCode
· Smilies
· Quoting
· Word censoring
· RSS feed support
· New topic feed
· Forum specific feed
· Disable registrations
· Registration notification
· Email validation
· Registration terms
· Online users list
· Avatar upload
· Signatures
· User post counts
· User ranks
· User profile
· User preferences
· User titles
· Topic search
· Author search
· Userlist search
· New posts view
· Recent posts view
· Unanswered posts view
· Subscribed posts view
· View specific users posts
· Forum categories
· Redirect forums
· User groups
· Group based permissions
· Moderator groups
· Group titles
· (Dis)Allow guest view
· (Dis)Allow guest posts
· Maintenance mode
· Permanent bans
· Temporary bans
· Delete users
· Ban by username
· Ban by email
· Ban by IP address
· Flood control
· User notes
· IP address logging
· (Dis)Allow used emails
· (Dis)Allow banned emails
· Report posts
· XHTML compliant
· Password hashing
· GZip output
· External SMTP support
· Language packs
· User selectable language
· CSS styles
· User selectable style
Requirements:
· PHP 4.1.0 or later
· MySQL 3.23.17 or higher or
· PostgreSQL 7.0 or higher or
· SQLite 2 (not 3)
What's New in This Release: [ read full changelog ]
· Per-group setting for disallowing links in posts (this also affects profile signatures and website fields).
· Promote users to new groups based on post count.
· Improved performance when updating topic reply counts.
· Added meta attributes for Google to make sense of pagination.
· Make labels for checkboxes and radio buttons in the admin panel clickable.