k4 Bulletin Board is a forum system, similar to other popular products in this category, with one major twist: AJAX, and lots of it. k4BB uses AJAX in an intuitive manner to benefit the primary functions of the forum system. Beyond the normal features found in forum software, such as an administration panel, template system, BBCode, and emoticons; k4BB provides inline polling, inline moderation (such as locking topics, editing topics) and a true quick reply function.

k4BB runs on PHP4/PHP5 and currently supports MySQL, MySQLi, SQLite, and PostgreSQL databases. Check out the live demo on the k4BB website.