WackoWiki is a small, lightweight, handy, expandable, multilingual Wiki-engine based on Wakka Wiki written in PHP, which uses MySQL to store pages. WackoWiki has an WYSIWYG-like editor, easy installer, many localizations, email notification on changes/comments, several cache levels, design themes (skins) support, XHTML compliance, page rights (ACLs), and page comments. WackoWiki is licensed under BSD.

WackoWiki is developed by Russian programmers, but it is not a Russian-only engine. At the moment it supports RU, EE, EN, ES, DE, DA, FR, NL, IT, PL, PT, MD, and BG languages. WackoWiki was forked from the famous WakkaWiki engine in 2003 when Hendrik Mans and Carlo Zottmann, the original developers, abandoned it.

WackoWiki allows the use of full HTML capabilities, and uses the SafeHTML parser (written by the same developers) to strip down all potentially dangerous content (JavaScript etc.), which may cause XSS vulnerabilities.

Developers of WackoWiki also created WikiEdit, a JavaScript WYSIWYG-like editor with shortcuts and toolbar support. WikiEdit also supports autoindenting (and increments in ordered lists) - a unique feature for a web-based editor.

WackoWiki is widely used in Russia as a wiki-engine, and by many IT companies as a lightweight CMS and a Knowledge Management System and shares several modules, developers, and a bugtracker with the NPJ engine.

The latest version is R4.2, released on 27 March 2005.

Wacko features

all features from Wakka Wiki, including installer & upgrader (because it is really a fork from it)

Designed for speed and extensibility

Quick and easy installation

Integrated user management

Access control through per-page access control lists

Integrated page-commenting functionality

Full revision control

Easily customizable

Supports multiple sites running off the same Wakka installation

clusters (subpages) & relative addressing

page watching & email notification on changes/comments (simple diff included in email)

enhanced What You Think Is What You Get editing - table markup, Open Wiki-compatible markup

Links can be Camel Case or Free Links

powerful diff between revisions

several levels of caching (backlinks, pages) bring significant performance gain compared to Wakka

automatic Table Of Contents generation

on-the-fly correction of punctuation typos & special characters (Typografica project)

design themes (skins) support.