|Developer(s)||Peter Thoeny with TWiki contributors|
|Initial release||23 July 1998|
|Stable release||5.1.4 (2013-02-16) [±]|
|Preview release||None (None) [±]|
TWiki is a Perl-based structured wiki application, typically used to run a collaboration platform, knowledge or document management system, a knowledge base, or team portal. Users can create wiki applications using the TWiki Markup Language, and developers can extend its functionality with plugins.
The TWiki project was founded by Peter Thoeny in 1998 as an open source wiki-based application platform. In October 2008, the company TWiki.net, created by Thoeny, assumed full control over the TWiki project while much of the developer community forked off to join the Foswiki project.
Major features 
- Revision control - complete audit trail, also for meta data such as attachments and access control settings
- Fine-grained access control - restrict read/write/rename on site level, web level, page level based on user groups
- Extensible TWiki markup language
- TinyMCE based WYSIWYG editor
- Dynamic content generation with TWiki variables
- Forms and reporting - capture structured content, report on it with searches embedded in pages
- Built in database - users can create wiki applications using the TWiki Markup Language
- Skinnable user interface
- RSS/Atom feeds and e-mail notification
- Over 400 Extensions and 200 Plugins
TWiki extensions 
TWiki has a plugin API that has spawned over 400 extensions to link into databases, create charts, tags, sort tables, write spreadsheets, create image gallery and slideshows, make drawings, write blogs, plot graphs, interface to many different authentication schemes, track Extreme Programming projects and so on.
TWiki application platform 
Wiki applications are also called situational applications because they are created ad-hoc by the users for very specific needs. Users have built TWiki applications that include call center status boards, to-do lists, inventory systems, employee handbooks, bug trackers, blog applications, discussion forums, status reports with rollups and more.
User interface 
The interface of TWiki is completely skinnable in templates, themes and (per user) CSS. It includes support for internationalization ('I18N'), with support for multiple character sets, UTF-8 URLs, and the user interface has been translated into Chinese, Czech, Danish, Dutch, French, German, Italian, Japanese, Polish, Portuguese, Russian, Spanish and Swedish.
TWiki deployment 
TWiki is primarily used at the workplace as a corporate wiki to coordinate team activities, track projects, implement workflows and as an Intranet Wiki. The TWiki community estimates 40,000 corporate wiki sites as of March 2007, and 20,000 public TWiki sites.
TWiki customers include Fortune 500 such as Disney, Google, Motorola, Nokia, Oracle Corporation and Yahoo!, as well as small and medium enterprises, such as ARM Holdings[dead link] and DHL. TWiki has also been used to create collaborative internet sites, such as the City of Melbourne's FutureMelbourne wiki where citizens can collaborate on the future plan.
TWiki is implemented in Perl. Wiki pages are stored in plain text files. Everything, including meta such as access control settings, are version controlled using RCS. RCS is optional since an all-Perl version control system is provided.
TWiki scales reasonably well even though it uses plain text files and no relational database to store page data. Many corporate TWiki installations have several hundred thousand pages and tens of thousands of users. Load balancing and caching can be used to improve performance on high traffic sites.
TWiki has database features built into the engine. A TWiki Form is attached to a page as meta data. This represents a database record. A set of pages that share the same type of form build a database table. A formatted search with a SQL-like query can be embedded into a page to construct dynamic presentation of data from multiple pages. This allows for building wiki applications and constitutes the TWiki's notion of a structured wiki.
TWiki release history 
- 1998-07-23: Initial version, based on JosWiki, an application created by Markus Peter and Dave Harris
- 2000-05-01: TWiki Release 1 May 2000
- 2000-12-01: TWiki Release 1 December 2000
- 2001-09-01: TWiki Release 1 September 2001
- 2001-12-01: TWiki Release 1 December 2001 ("Athens")
- 2003-02-01: TWiki Release 1 February 2003 ("Beijing")
- 2004-09-01: TWiki Release 1 September 2004 ("Cairo")
- 2006-02-01: TWiki Release 4.0.0 ("Dakar")
- 2007-01-16: TWiki Release 4.1.0 ("Edinburgh")
- 2008-01-22: TWiki Release 4.2.0 ("Freetown")
- 2009-09-02: TWiki Release 4.3.2 ("Georgetown")
- 2010-06-10: TWiki Release 5.0 ("Helsinki")
- 2011-08-20: TWiki Release 5.1 ("Istanbul")
Forks of TWiki 
Forks of TWiki include:
- 2001: Spinner Wiki (abandoned)
- 2003: O'Wiki fork (abandoned)
- 2008: Foswiki, launched in October 2008 when a dispute about the future guidance of the project could not be settled, resulting in the departure of at least some TWiki contributors.
See also 
- "Everything You Need To Know To Get Started With Content Management Systems". InformationWeek. 10 September 2007. "TWiki is a structured wiki, which is a combination of a traditional freeform wiki and a more structured database"
- Matt Asay (29 October 2008). "TWiki's hunt for cash fractures its community". CNET.
- "TWiki Watch: TWiki Contributors".
- "Development of Foswiki and TWiki - Get the Facts (Part 1)".
- R. Morin: TWiki and Foswiki: the road ahead
- "extension repository". Twiki.org. Retrieved 2009-07-07.
- "TWiki Forms". Twiki.org. Retrieved 2009-07-07.
- SEARCH variable, formatted search, SQL-like query search
- "Sample TWiki applications". Twiki.org. Retrieved 2009-07-07.
- TWiki Contributors. "User Interface Localisation". twiki.org. Retrieved 2008-03-01.
- Paper on corporate wiki users (slides)
- "The wiki as online conveyor belt" section in BusinessWeek article Make Some Noise - How web 2.0 tools can help you communicate with customers more effectively
- "Estimated number of TWiki installations". Twiki.org. Retrieved 2009-07-07.
- "What do TWiki users say?". Twiki.net. Retrieved 2009-07-07.
- "Case Study: Wikis give ARM Holdings a leg-up". Wall Street Journal. Market Watch. 2007-01-24. Retrieved 2010-10-06.
- "TWiki success story of DHL Packstation". Twiki.org. Retrieved 2009-07-07.
- Future of Melbourne City Plan
- "TWiki Scalability". Twiki.org. Retrieved 2009-07-07.
- "FormattedSearch < TWiki < TWiki". Twiki.org. Retrieved 2009-07-08.
- "QuerySearch < TWiki < TWiki". Twiki.org. Retrieved 2009-07-08.
- "TWiki Copyright Disclaimer". Retrieved 2008-10-30.
- "TWikiHistory page". Retrieved 2008-10-30.
- Thoeny, Peter; Tom Barton (2008-10-31). "Relaunch TWiki.org Project". twiki.org. Retrieved 2009-02-04.
- "Why this fork?". Foswiki. 2009-01-31. Retrieved 2009-02-04.
- TWiki.org - Open source community site
- Comparison between TWiki and MediaWiki
- TWIKI.NET - company providing commercial installation, support and hosting solutions for TWiki
- WikiMatrix description of TWiki
- Foswiki.org - The Free and Open Source Wiki site