Oddmuse vs. JSPWiki vs. TWiki vs. TiddlyWiki

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

[link]
[text|link]
[text|wiki:link]

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

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

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/]
[example|http://www.example.com/]
[text|wiki:link]

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

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

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

section
=======

subsection
----------

! Level 1
!! Level 2
!!! Level 3

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

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

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

__bold__

*bold*

''bold''

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

''italics''

_italic_

//italic//

Depending on plugins:
_underline_
__underline__

%%(text-decoration: underline) text %%

<u>underline</u>

__underline__

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

{{monospace}}

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

{{{monospaced}}}

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

%%(text-decoration: line-through) deleted text %%

<strike>strikethrough</strike>

--strikethrough--

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

%%(vertical-align: sup) text %%

<sup>superscript</sup>

^^superscript^^

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

%%(vertical-align: sub) text %%

<sub>subscript</sub>

~~subscript~~

http://example.com/pic.jpg

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

[local.jpg]
[{Image src='local.jpg'}]
[{Image src='http://foo.bar/foo.jpg'}]

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

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

no example known

%%(text-align: right) text %%

| left |   center   |   right |
or HTML
or CSS

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

Depending on plugins:
> text

[quote]
text
[/quote]

: one
:: two

%%(text-indent: 20px) 20 pixels %%
%%(text-indent: 30%) 30 percent %%

<blockquote>
multi line text
</blockquote>

:indent

> quote

<<<
blockquote
<<<

* one
** two

* Item 1
** Item 1.1
* Item 2

* Item 1
* Item 1.1
* Item 2

* Item 1
** Item 1.1
* Item 2

Depending on plugins:
1. one
2. two

# one
## two

# Item 1
## Item 1.1
# Item 2

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

# Item 1
## Item 1.1
# Item 2

Depending on plugins:
; term: definition

;term:definition

$ Term: Definition

; term
: description

Depending on plugins:
----

----

---

----