MediaWiki vs. PhpWiki vs. Confluence vs. TiddlyWiki

[[a link]]
[[a link|with title]]

WikiWord or [somelink]
[ desc | pagename ]

[Page Title]
[Link Title|Page Title#anchor]
[~username]
[^attachment.doc]

WikiWord (CamelCase)
[[link]]
[[label|link]]

[http://example.org The title]

http://someserver/someurl
[ desc | exturl ]

[http://www.example.com]
[Link Title|http://www.example.com]
[Shortcut Link|PageName@otherwiki]

http://www.example.com
[[label|http://www.example.com]]

==Section==
===Subsection===
====Sub-subsection====

!!!Headline1
!!Headline2
!Headline3

h1. Top Level Heading
h2. Smaller Heading
h6. Smallest Heading

! Level 1
!! Level 2
!!! Level 3
!!!! Level 4
!!!!! Level 5

'''bold'''

*bold* or
<strong>bold</strong>

*bold*

''bold''

''italic''

_italics_ or 
or
<em>italics</em>

_italics_

//italic//

<u>underlined</u>

<u>underlined</u>

+underline+

__underline__

<tt>monospace</tt>

<tt>monospace</tt>
<code>code</code>
<pre>preformatted</pre>
<verbatim>
unparsed text</verbatim>

{{monospace}}

{{{monospaced}}}

<s>strikethrough</s>

<strike>striked through</strike>

-strikethrough-

--strikethrough--

<sup>superscript</sup>

<sup>above</sup>

^superscript^

^^superscript^^

<sub>subscript</sub>

<sub>below</sub>

~subscript~

~~subscript~~

[[Image:wiki.png]]

[ http://foo.org/1.jpg size=30%] 
external image
[Upload:view.jpg align=right size=50x40] 
view uploaded image
[Upload:view.jpg | http://server/external-linkjpg ] 
view and link to another image

[img[local.jpg]]
[img[http://foo.bar/foo.jpg]]

<center>Centered</center>

<?plugin RawHtml <span align="right"> ?>right<?plugin RawHtml </span> ?>
or <div align="right"> right </div>

using custom classes, e.g.
{{right{
text
}}}

: indented line

;: left indent
;;: more left indent

or 
paragraph
and another level 

:indent

> quote

<<<
blockquote
<<<

* Item 1
** Item 1.2
* Item 2

* list
or
- list

* one
** one-two
* two
* three

* Item 1
** Item 1.1
* Item 2

# Item 1
## Item 1.2
# Item 2

# list

# one
## one-two
# two
# three

# Item 1
## Item 1.1
# Item 2

; term : definition

Term:<def>
def

; term
: description

----

----

----

----