yande.re is an anime-focused imageboard, or "booru", that utilizes a comprehensive tag system to categorize and archive images for easy browsing and discovery.
imgin is a social media imageboard. People can register to post threads, make comments, and follow each other. The site is currently in beta.
BlockChan is a 100% free, censorship resistant, immutable, open source decentralized image board.
Lainchan is a great imageboard package, actively building on it and adding a lot of features and other improvements.
Drag and drop and make collections out of images and links on websites. Good as a shopping assistant, save-for-later lists and more!.
Tinyboard is a light-weight, fast, highly configurable and user-friendly imageboard software package released under a non-restrictive open-source license.
a simple image board alternative to 4chan small but still a nice community with much more rules than 4chan.
Kusaba X is open source imageboard software written in PHP, a continuation of the...
A modern, full featured and actively developed imageboard engine (similar to Futaba, Kusaba and 4chan). Based on (and compatible with) Tinyboard.
FoolFuuka was designed to serve two different purposes: (1) as a front-end for Asagi, a 4chan fetcher, and (2) an image-based bulletin board.
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.
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.
imgin is a social media imageboard. People can register to post threads, make comments, and follow each other.
Lightweight PHP image board with MySQL, SQLite, or flat file database support. Very easy to install and use.