The KiWi core system is a flexible platform for building different kinds of semantic social software applications on top (currently the Semantic Wiki and the TagIT application). It provides all the core services required in such applications, like editing and tagging, the storage of content and associated meta-data, its own triple store, transactions and versioning over content and meta-data, a linked open data server, and many small features semantic social software developers will like (like convenience services for working with ontologies or SKOS thesauruses, etc.).
Sputnik is a content management system (CMS) designed for extensibility. It works as a wiki out of the box, but can be extended into other things. It offers editable nodes, history and diff, user accounts with optional email validation, a flexible permission system, RSS feeds, and more. Sputnik supports access control and has editable templates. It can be used to maintain a personal Web site that doesn't look like a wiki and that only you can edit. Sputnik is easy to install on shared hosting without root accounts.
LevelTen iSite Essentials (iSE) is a CMS designed to enable organizations to build Web 2.0 sites. It is an extended distribution of the Drupal CMS. It is ideal for Web sites that need a brochureware section and want to integrate Web 2.0 portal features. The iSE distribution will greatly shorten the Drupal learning curve and guide people towards deploying enhanced interactive Web sites.
Foswiki is wiki software, supporting the editing of Web pages in an ordinary Web browser by end users. What makes Foswiki special is that it supports the embedding of active and passive macros that enhance the page content (e.g. with global or dynamic information) and allow end-users to build applications that store and process data in a structured manner.
DotNetWikiBot Framework is a full-featured client API with a console interface that allows you to build programs and Web robots easily to manage information on MediaWiki-powered sites. DotNetWikiBot Framework is intended to help with many complicated and routine tasks of wiki site development and maintenance. Any .NET language can be used to access DotNetWikiBot library functions. Only minimal programming skills are required to make bots with DotNetWikiBot Framework.
LionWiki is a minimalist file-based (doesn't need a database), templatable, extensible wiki engine that works from just one file (30KB). It supports page history, recent changes, interface localization, password protection (both writing pages and seeing), and much more through plugins (CAPTCHA, RSS, syntax for Tables). It's intended for small personal Web sites, notebooks, and other simple applications. Installation is very easy: just copy the file and create a directory.
Hatta is a small wiki engine for use inside a Mercurial repository. It can run locally and doesn't require any configuration; it's just a single Python file. It can be also configured to run on a Web server. Since the wiki can be cloned and merged along with the repository, it's perfect for working on project documentation in small teams.
OpenInviter is a script to import contacts (address book data) from email providers like Yandex, Lycos, Rambler.ru, Live / Hotmail, OperaMail, GMX.net, Mail.ru, Mail.com, GMail, Yahoo!, Rediff, AOL, and KataMail. It can import from content management systems like SimpleMachines Forum (SMF), Drupal, Social Engine, Wordpress, PunBB, Joomla, JamRoom, and PhpBB. It also imports from social portals like Twitter, Facebook, Hi5, Friendster, Orkut, Myspace, and LinkedIn. It offers basic "tell a friend" features.