TiddlyWiki vs. Oddmuse vs. KeheiWiki vs. ikiwiki

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

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

%topic%  ( '%' configurable )
or
<link topic>text</link>
or
use HTML in rich text editor

[[internal]]

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

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

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

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

http://gmail.com/
or
<extern http://gmail.com>a mail server</extern>
or
use HTML in rich text editor

[link text](http://example.org)

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

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

section
=======

subsection
----------

text  ----    
or
insert HTML via WYSIWYG editor

Two syntaxes:

# heading 1
## heading 2
### heading 3

heading 1
=========

heading 2
---------

''bold''

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

_ text _ 
or
insert HTML via WYSIWYG editor

**bold**
__bold__

//italic//

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

* text *
or
insert HTML via WYSIWYG editor

*emphasized*
_emphasized_

__underline__

Depending on plugins:
_underline_
__underline__

insert HTML via WYSIWYG editor

via HTML: <u>underlined</u>

{{{monospaced}}}

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

<wiki code>
stuff
</wiki code>

`inline monospace`

indented block of
monospaced text

tab-indented
block

--strikethrough--

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

insert HTML via WYSIWYG editor

via HTML: <del>deleted</del>

^^superscript^^

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

insert HTML via WYSIWYG editor

via HTML: x<sup>2</sup>

~~subscript~~

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

insert HTML via WYSIWYG editor

via HTML: a<sub>1</sub>

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

http://example.com/pic.jpg

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

insert HTML via WYSIWYG editor

![alt text](internal/image)
![alt text](http://example.org/external/image)

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

no example known

<p align=right> stuff
or
insert HTML via WYSIWYG editor

:indent

> quote

<<<
blockquote
<<<

Depending on plugins:
> text

[quote]
text
[/quote]

: one
:: two

<ul>
stuff
</ul>
or
insert HTML via WYSIWYG editor

* Item 1
** Item 1.1
* Item 2

* one
** two

* text
or
<!> text
or
insert HTML via WYSIWYG editor

* item 1
* item 2
* item 2.1
* item 2.2

# Item 1
## Item 1.1
# Item 2

Depending on plugins:
1. one
2. two

# one
## two

digits. stuff
or
insert HTML via WYSIWYG editor

1. item 1
2. item 2
1. item 1.1
42. the value doesn't matter
1. any value works

; term
: description

Depending on plugins:
; term: definition

term:    definition
or
insert HTML via WYSIWYG editor

via HTML:
<dl>
<dt>term</dt>
<dd>definition</dd>
</dl>

----

Depending on plugins:
----

can use plain < HR > tag or
via WYSIWYG editor

---
***
___
------------------
Any number > 3
- - - - - - - - - -
spaces don't matter