FoolFuuka!

Qabna is a imageboard for users that want a simple and easy way to use an imageboard on basically any OS, all the way from Windows ME or Mac OS 10.1 to Windows 10 or Mac 10.11.

Tinyboard is a light-weight, fast, highly configurable and user-friendly imageboard software package released under a non-restrictive open-source license. It is written in PHP and has few dependencies.

A modern, full featured and actively developed imageboard engine (similar to Futaba, Kusaba and 4chan). Based on (and compatible with) Tinyboard.

Saguaro is a small branch of the image board software Futallaby .

Glaukaba is a Wakaba (an imageboard script) fork with many additional features and enhancements including WebM and FastCGI support.

Kusaba X is open source imageboard software written in PHP, a continuation of the kusaba imageboard software, which Trevor has quit supporting. While other Kusaba derivatives are adding more bloat than functionality, Kusaba X is determined on adding functionality first.

Wakaba is an image board script very strictly modelled after the Futaba and Futallaby scripts. Wakaba borrows quite a bit of HTML code and translated text from Futallaby.

Lightweight PHP image board with MySQL, SQLite, or flat file database support. Very easy to install and use.

Project Mitsuba is an opensource (AGPLv3 licensed) image board software written in PHP and using MySQLi.