MediaWiki vs. TWiki vs. TiddlyWiki vs. PmWiki

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

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

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

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

[http://example.org The title]

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

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

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

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

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

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

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

'''bold'''

*bold*

''bold''

'''bold'''

''italic''

_italic_

//italic//

''italic''

<u>underlined</u>

<u>underline</u>

__underline__

{+underlined+}

<tt>monospace</tt>

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

{{{monospaced}}}

@@monospace@@

<s>strikethrough</s>

<strike>strikethrough</strike>

--strikethrough--

{-strikethrough-}

<sup>superscript</sup>

<sup>superscript</sup>

^^superscript^^

'^superscript^'

<sub>subscript</sub>

<sub>subscript</sub>

~~subscript~~

'_subscript_'

[[Image:wiki.png]]

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

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

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

<center>Centered</center>

| left |   center   |   right |
or HTML
or CSS

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

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

: indented line

<blockquote>
multi line text
</blockquote>

:indent

> quote

<<<
blockquote
<<<

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

* Item 1
** Item 1.2
* Item 2

* Item 1
* Item 1.1
* Item 2

* Item 1
** Item 1.1
* Item 2

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

# Item 1
## Item 1.2
# Item 2

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

# Item 1
## Item 1.1
# Item 2

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

; term : definition

$ Term: Definition

; term
: description

: term : definition

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