Oddmuse vs. TiddlyWiki vs. PhpWiki vs. PmWiki vs. TWiki vs. MediaWiki

optional, default on:
[[page name]]

optional, default off:
PageName
[PageName] → [1]
[[[page name]]] → [1]
[PageName text] → text
[[page name|text]] → text

Depending on plugins:
[text](page) → text

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

WikiWord or [somelink]
[ desc | pagename ]

[[page name]]
[[page name | link text]]
[[link text -> page name]]
[[#anchor]]
[[#anchor|link to anchor]]
[[page name #anchor]]

WikiWord autolink
Otherweb.WikiWord
[[Spaced text]]
[[WikiWord][label]]

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

http://example.com/
[http://example.com/] → [1]

optional, default on:
[http://example.com/ text] → text

Depending on plugins:
[text](http://example.com/) → text

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

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

http://....
[[http://... | link text]]
[[link text -> http://...]]

http://twiki.org/ autolink
[[http://twiki.org/][label]]

[http://example.org The title]

Depending on plugins:
## two
### three
== two ==
=== three ==

section
=======

subsection
----------

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

!!!Headline1
!!Headline2
!Headline3

! Level 1
!!#anchor Level 2
!!! Level 3

---+ Level 1
---++ Level 2
---+++ Level 3
---++++ Level 4
---+++++ Level 5
---++++++ Level 6

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

Depending on plugins:
*bold*
**bold*
'''bold'''

''bold''

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

'''bold'''

*bold*

'''bold'''

Depending on plugins:
*italic*
/italic/
//italic//
''italic''

//italic//

_italics_ or 
or
<em>italics</em>

''italic''

_italic_

''italic''

Depending on plugins:
_underline_
__underline__

__underline__

<u>underlined</u>

{+underlined+}

<u>underline</u>

<u>underlined</u>

Depending on plugins:
`mono`
##mono##
[code]mono[/code]
<tt>mono</tt>
<code>mono</code>

{{{monospaced}}}

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

@@monospace@@

=monospaced text= and
<verbatim>
multi line text
</verbatim>

<tt>monospace</tt>

via bbCode plugin:
[s]strike through[/s]

--strikethrough--

<strike>striked through</strike>

{-strikethrough-}

<strike>strikethrough</strike>

<s>strikethrough</s>

via bbCode plugin:
[sup]superscript[/sup]

^^superscript^^

<sup>above</sup>

'^superscript^'

<sup>superscript</sup>

<sup>superscript</sup>

via bbCode plugin:
[sub]subscript[/sub]

~~subscript~~

<sub>below</sub>

'_subscript_'

<sub>subscript</sub>

<sub>subscript</sub>

http://example.com/pic.jpg

Depending on plugins:
[[image:Name|Text|URL]] and variants
![text](URL)

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

[ 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

https://foo.bar/foo.jpg
Attach:foo.jpg
Attach:foo.jpg"alt/title text" | Caption

%ATTACHURL%/image.png
http://any.domain/image.png

[[Image:wiki.png]]

no example known

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

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

%center% centered text
%right% right aligned
%lfloat% left floating text
%rfloat% right floating text
%rframe% right floating frame
%lframe% left floating frame

| left |   center   |   right |
or HTML
or CSS

<center>Centered</center>

Depending on plugins:
> text

[quote]
text
[/quote]

: one
:: two

:indent

> quote

<<<
blockquote
<<<

;: left indent
;;: more left indent

or 
paragraph
and another level 

-> indented text
--> more indentation
-< hanging text
--< more indentation

<blockquote>
multi line text
</blockquote>

: indented line

* one
** two

* Item 1
** Item 1.1
* Item 2

* list
or
- list

* Item 1
** Item 1.1
* Item 2
alternatively, indented:
* item 1
* item 1.1
* item 2

* Item 1
* Item 1.1
* Item 2

* Item 1
** Item 1.2
* Item 2

Depending on plugins:
1. one
2. two

# one
## two

# Item 1
## Item 1.1
# Item 2

# list

# Item 1
## Item 1.1
# Item 2
alternatively, indented:
# Item 1
# Item 1.1
# Item 2

1. Item 1
a. Item 1.a
1. Item 2

# Item 1
## Item 1.2
# Item 2

Depending on plugins:
; term: definition

; term
: description

Term:<def>
def

: term : definition

$ Term: Definition

; term : definition

Depending on plugins:
----

----

----

----

---

----