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Features of PmWiki

Costs & reputation

License	Free software licensed under the GNU GPL
User support	On website, eg FAQ, troubleshooting guide, specific error messages descriptions, and by mailing lists (also in German, Spanish, French)
Reviews	Favorable
System
Server Requirements	PHP 5.3 or newer recommended, 5.2 minimum; developed and tested with the latest PHP version (7.4 as of January 2020); can run in safe mode. See web hosts and the Standalone recipe.
Page storage	Flat files; no need for a database. Can handle thousands of pages. See Flat File Advantages.
Upgrades	By simply copying new version files or export from the Subversion repository
Addons	There are nearly 400 Cookbook:. recipes.
Security
SPAM protection	By blocking words, IP addresses (option), and by limiting the quantity of non-approved URLs (option), by encrypting the email address (addon)
Passwords	Page, group or site based, see also passwords administration
User authentication	Available as an option (AuthUser) or an addon (UserAuth).
Features
Features at a glance	and a detailed list of Features
Page editing	Similar to others wikis. Has a button bar and Preview capability. Handles simultaneous edits. Optional save-as-draft feature. Addon for spell checking
Page history	History pages include Restore links. Configurable number of days and number of revisions of history.
Free links and WikiWords	Wiki Word links are an option in version 2.1. In previous releases they were enabled by default.
Intersites links (InterMap)	Configurable by the administrator or defined in the Site.InterMap? page.
Groups and hierarchy	One level only, handles menus and styling by groups, see Wiki architecture
Categories	Organise and find related pages with special Category markup.
Navigation trails	Allow wiki authors to create "trails" through sequences of pages in the wiki.
Search tools	Search the entire site or the current group. Administrator may exclude pages from appearing in search results. Pre-defined searches are also available.
Email-notification of revised pages	Option, by admin, site based: enable Notify in the local/config of the page(s) you want to monitor.
Web Feeds	Optional RSS, Atom, and Dublin Core syndication feeds as well as feed links to enable autodiscovery of the feeds
Podcasting	Web feed enclosures are supported.
Publish as static pages	Available as Cookbook recipe Cookbook.StaticPages?
International versions	See Other languages. Handles accented characters and UTF-8.
Page renaming	addon
Site Map	Available via the pagelists directive.
Backlinks	Available since version 2.0.beta33
New page templates	new page edit templates?
Layout
Skins	By admin, can be table or CSS based, addon for switching by users and interactive configuration
Layout modifications	By admin and by user, see group headers
Printable layout	Suppress menu, make link list and miscellaneous reformatting
Style and custom markup
Tables	Tables and Table Directives
Table Edit	Addon - table editor
Page table of contents	Addon - see also numbered headers
Inclusion in page	Of other pages (part or complete)
Anchors	In same or other page
User uploaded attachments	Option to set
Images resizing and galleries	By addons, see also the category images
Forms	Forms may be embedded in wiki pages.
In browser drawing edit	By addon, need java enabled on browser.
User preferences	Option. See also the SkinChange add-on.
HTML details
Handles HTML meta informations	Keywords (site, group or page based), automatic noindex, nofollow for utility pages
HTML compatibility	XHTML 1.0 transitional, may differ for miscellaneous skins
allow embedding of html in wiki pages	Cookbook:enable HTML
Browser caching	Option
Nice URLs?	See also $EnablePathInfo in LayoutVariables
Hide e-mail addresses?	Addon
Miscellaneous addons
Calendar	Each date becomes a wiki page. There are two possible implementations: WikiCalendar and PmCalendar. CopyPasteCalendar? is another option (relies solely upon core PmWiki features).
Latex in Wiki?
Publish trails
Forum	There are 2 addons: Forum and SimpleForum
Guestbook
For the full list ...	See the Cookbook recipes.
Administration details
Wiki farms	To have multiple wikis with a single installation of the wiki engine
Missing and orphan pages search	Option - You can also list orphan and missing attachments (addon)
Handling of features requests and bug reports

Elements which are not listed as features and are strengths of PmWiki :

• Small code base (under 2 MB)
• Many parameters are handled by pages, without having the need to open system files, which greatly helps the Wiki administration.
• While there is only one major developer, there is a very active community and most addons are from independent people.

Add a new feature you would like to see in PmWiki as a new PITS? entry marked Feature Request, or use one of the mailing lists to brainstorm new features.

Enjoy!