Source: http://screwturn.net/Help.WikiMarkup
If you want to copy this page in your own wiki, you can simply 
copy the markup and paste it into a page in your wiki.
Text Formatting
| '''bold''' | bold |  | 
| ''italic'' | italic |  | 
| __underlined__ | underlined |  | 
| --strike-through-- | strike-through |  | 
| {{inline code - monospace font}} | inline code - monospace font |  | 
| @@block code - [WikiMarkup] is ignored@@ | block code - [WikiMarkup] is ignored |  | 
| ---- |   | Horizontal ruler | 
| [MainPage|MainPage]or[MainPage|my link] | MainPage or my link |  | 
| [++Dev.MainPage]or[++Dev.MainPage|my link in another namespace]or[++MainPage|root] | Dev.MainPage or my link in another namespace or root | Add ++to the link for linking to another namespace, including the root | 
| Alternatively |  |  | 
| [^++Dev.MainPage]or[^++Dev.MainPage|my link in another namespace]or[^++MainPage|root] | Dev.MainPage or my link in another namespace or root | Add ^at the beginning of the string to make the link open in a new tab. | 
| [http://www.sunhorizon.info]or[http://www.sunhorizon.info|SunHorizon Wiki] | http://www.sunhorizon.info or SunHorizon Wiki |  | 
| [email@server.com]or[email@server.com|contact us] | email@server.com or contact us |  | 
| [c:Help.Wiki]or[c:Help.Wiki|Pages of category 'Wiki'] | Help.Wiki or Pages of category 'Wiki' | Links to a category | 
| ==Title== | Title |  | 
| ===Sub-Title=== | Sub-Title |  | 
| ====Sub-Sub-Title==== | Sub-Sub-Title |  | 
| =====Sub-Sub-Sub-Title===== | Sub-Sub-Sub-Title |  | 
| {t:PageToTransclude} |  | Displays the content of PageToTransclude from the same namespace, in-place | 
| {t:OtherNS.PageToTransclude} |  | Displays the content of PageToTransclude from namespace OtherNS, in-place (prepend page name with ++to transclude a page from the root namespace) | 
| >>> PageName |  | Redirects to PageNamein the current namespace | 
| >>> Namespace.PageName |  | Redirects to Namespace.PageName | 
| >>> ++PageName |  | Redirects to PageNamein the root namespace | 
| ~~~~ | Dario Solera, 2009/11/10 10:01 | Adds a signature for the user who made the change | 
| (((Boxed))) | Boxed | Wraps content in a box | 
| : Indentation | Indentation | Each ':' sign at the beginning of a line indents content one level | 
 Lists
You can create an unordered or ordered lists using 
* and 
# characters, for example:
| * List element
* Another element,
which continues on a new line
* A third element
 | List elementAnother element,which continues on a new line
A third element
 
 | Always keep an empty line after a list | 
| # List element
# Another element,
which continues on a new line
# A third element
 | List elementAnother element,which continues on a new line
A third element
 
 | Always keep an empty line after a list | 
| * List element
*# Sub-element,
which continues on a new line
*# Still a sub-list
* A third element
 | List elementSub-element,which continues on a new line
Still a sub-list
A third element
 
 | You can combine *and# | 
Anchors
Anchors are used to mark specific location on a page so they can be called from another part of the same page or from an external page to open at that particular part of the page.
| [anchor|#anch-1] | [WikiMarkup#anch-1|Anchor 1] | Example 1: Go to Anchor 1 in this page. | 
| [anchor|#anch-2] | [WikiMarkup-Tables#anch-1|Anchor 2] | Example 2: Go to Anchor 2 on another page in the same Namespace, opening in the same tab. | 
| [anchor|#anch-3] | [^++Dev.WritingFormatter#anch-3|Anchor 3] | Example 3: Go to Anchor 3 on a page in a different Namespace, opening in a new tab. | 
 
Tables
You can create tables using a simple markup. Please refer to the 
dedicated section for details.
File Links and Pictures¶
| [{UP}/v1Site/Grass.png|download image] | download image |  | 
| [{UP(Help.WikiMarkup)}SamplePicture.jpg|download attachment] | download attachment | Help.WikiMarkupis the full name of this page and the SamplePicture.jpg file is an attachment of this page | 
Displaying Pictures
You can displaying pictures using a simple markup. Please refer to the 
dedicated section for details.
Special Tags
All Special Tags are 
case insensitive.
| {WikiTitle} | devio dbscript ScrewTurn Wiki | Title of this wiki | 
| {Top} | Top | Link to the top of the page | 
| {TOC} |  | Table of Contents of the current page | 
| {ThemePath} | Themes/Default-v2/ | Path of the current theme | 
| {RSSPage} |  | URL of the RSS Page | 
| {WikiVersion} | 3.0.1.400 | Version of ScrewTurn Wiki | 
| {MainURL} | http://screwturn3.devio.at/ | URL of the wiki | 
| {PageCount} | 338 | Number of pages in the current namespace | 
| {PageCount(*)} | {PageCount(*)} | Number of pages in the entire wiki | 
| {Username} | Guest | Username of the current user, if any | 
| {LoginLogout} | Login | Login/Logout link, according to the current session | 
| {Cloud} |  | Page categories cloud | 
| {PageName} | WikiMarkup | Name of the current page | 
| {Namespace} | <root> | Current namespace | 
| {NamespaceDropDown} |  | Drop-down list of namespaces | 
| {NamespaceList} |  | List of namespaces | 
| {Orphans} |  | List of pages that have no incoming links | 
| {Wanted} |  | Lists of pages that need to be created | 
| {Incoming} |  | List of pages that link the current page | 
| {Outgoing} |  | List of pages linked in the current page | 
| {RecentChanges} |  | List of recent changes made in the current namespace | 
| {RecentChanges(*)} |  | List of recent changes made in the entire wiki | 
Escaping Content
There are two ways to escape content that is usually interpreted by the 
WikiMarkup formatter.
This will simply ignore any 
WikiMarkup wrapped in it:
<nowiki>[this would be a link]</nowiki> results in [this would be a link]
This will escape all special characters, so they are displayed on the screen:
<esc><b>some HTML</b></esc> results in <b>some HTML</b>
This will ignore any new-line wrapped in it:
<nobr>some content
and then some more</nobr>
results in
some content and then some more