pikipiki

pikipiki is a cooperative authoring system for the web. It is written in Python, with a strong emphasis on small, simple code: the current version is about 580 lines of commented code. pikipiki is in the WikiWiki genre.

I consider PikiPiki to be complete and I'm not planning to add any new features. I would like it to stay small; there are plenty of large wiki programs out there is you want them. I am happy to hear from you if you're using it or have patches.

PikiPiki has given rise to several other programs which extend it in different ways. Many people have found it a good base for writing wiki-like software in Python, although it is useful by itself.

download

Installation instructions
License agreement. Note that because PikiPiki is licenced under the GNU GPL, any derivative works must also be released under the GPL.
piki.py -- just the source
piki-1.62.zip -- Source, documentation and sample database
freshmeat record
Random patches contributed by various generous people.

child projects

MoinMoin is distantly descended from PikiPiki. It has many more features including version control, pluggable parsers and formatters, and multilingual support.
Diamond Wiki is based on PikiPiki and attempts to combine faceted navigation with wiki- and blog-style features.
PyDiddy is a port of PikiPiki to WebWare.
AtomWiki is an extension of PikiPiki to add support for the Atom weblog authoring API.
MonkeyWiki is a descendent of PikiPiki with page templates, backups over email, simple markup and the goal of static HTML caching.

There is a page about PikiPiki on the original C2 wiki. There are larger lists of wiki software on Wikipedia and WikiWiki, plus help on choosing a wiki.

patches

Panu Kalliokoski:

I've been using PikiPiki for my own net diary, and because my main language is Finnish and Finnish has quite strict rules for compound words etc., I've made a bunch of enhancements to PikiPiki to allow me to use link names / page titles that look aesthetical by Finnish standards. :) Most importantly, I've implemented the [link] syntax and made the corrections needed to make PikiPiki work with pages that have all kinds of weird characters in their names.
Other changes include some bugfixes (edit screens would be trashed by unquoted <>&), and a WantedPages macro.
patch