GeboGebo is a wiki system written for tdbengine. It stores all data in a local database structure and thus provides an indexed fulltext search. It uses a simple syntax, and has user lists, pages history, a missing pages list, and a recent changes list. Image and file upload are possible, but can be disabled. This allows it to work as a small document management system. A blacklist allows you to lock existing pages from being edited or new pages from being created. It can also be run in static mode, where all pages are additionally held as static HTML pages.
Oddmuse is a Wiki engine, a CGI script that creates an entire Website with editable pages. By default, anybody can edit the pages. The entire site can be made read-only, and single pages can also be made read-only. In that case, only people having the admin or the editor password can edit pages. This way, the Wiki can be used as a cheap, simple, and easy-to-understand content management system (CMS). The site can also be switched to Weblog style, such that anybody can post comments, but only the editor can add new pages.
Wikepage is a very small wiki/blog/personal site builder. It uses flat files as a database, so no extra database is required. It has i18n support, multi-language site support, password protected pages, table support, CSS styling, file upload, RSS output, and a lot of other features.
Pie is a lightweight content management system for Web-sharing documents, files, and arbitrary pieces of information. Making use of a Wiki's meta language and page-linking abilities, it lets authors create and maintain content via HTTP on a corporate basis. It features an emphasis on fast content delivery to its recipients rather than sophisticated add-ons, therefore conveying compiled output instead of performing time consuming run-time processing.
Beryo is a Web content management system. It outputs valid XHTML and CSS 2.0, and its backend is very intuitive. It features a very simple system of publication, a file cache system, several existing modules (such as forum, agenda, news), internationalization, and basic monitoring. Beryo tries to be as simple as possible but keeps a high level of configurability.
Morcego is a 3D graph browser for viewing and navigating any graph-like structure. Examples of such structures include social networks, site maps, hierarchies, and genealogy trees. It currently only support simple graphs. It's already integrated into TikiWiki. Morcego is not meant to provide a solution for the end user, but to be embedded in a Web application by developers. It's a Java applet that communicates with an XML-RPC server to load the graph that is displayed.
JSPWiki is a JSP-based WikiWiki clone. It supports all the standard Wiki features, including attachments, full UTF-8 support, templates, and page locking. It also supports an XML-RPC API for scripting, Weblog functionality, Atom and RSS feeds, WikiForms, spam filtering, in-page CSS, and very fast searching using Lucene. Most functions are served by plugins, so you can develop your own extensions.