Monospace 
{{mono}}

No wiki formatting
{noformat}__No__ formatting{noformat}

Italicise text
_italic_

Bold text
*bold*

Bold and italic
*_bold & italic_*

Internal link (within Wikipedia)
[name of page]
[display text|name of page]
[label in this page|#section in this page]

External link (to other websites)
[http://www.example.com]
[display text|http://www.example.com]
[display text|http://www.example.com]
[Secure|https://security.com]

Applies only at the beginning of the line
Headings
of different sizes

h1. Level 1
h2. Level 2
h3. Level 3
h4. Level 4

Bullet list

* one
* two
** two point one
* three

Numbered list

# one
# two
## two point one
# three

Thumbnail image

!hobbespounce.gif!
!Wiki.png!

{toc}

Tables

|| Header1 || Header2 || Header3 ||
| r1c1 | r1c2 | r1c3 |
| r2c1 | r2c2 | r2c3 |

|| Header1 || Header2 || Header3 ||
|| Row1 Header | r1c2 | r1c3 |
|| Row2 Header | r2c2 | r2c3 |


No headers:

| r1c1 | r1c2 |
| r2c1 | r2c2 |

Row and Col spans:

| row1-column1 | row1-column2 | row1-column3 |
| row2-columns123 | | |
| row3-column1 | row3-columns23 | |

Preformatted:
{noformat}This __might__ have some ((Wiki syntax)). That's ignored.{noformat}

Code:
{code}
System.out.println("This is code");
{code}


{panel}
{{And what does this white-space starting line mean?}}
{{Is this like a pre tag?}}
{{How does it treat [Wiki syntax]?}}
{panel}

Colored text:
{color:#FFEE33}some text{color}

Underlined:
+underlined+

Title bar:
h1. title

Centered text
Centered

{panel}
Just a panel?
{panel}

{anchor:section in this page}

Mostly from [WikiSyntax|http://tikiwiki.org/tiki-index.php?page=WikiSyntax]