PmWiki vs. Oddmuse vs. Foswiki vs. TiddlyWiki

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

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

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

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

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

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

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

External Link
http://foswiki.org/ autolink
[[http://foswiki.org/][label]]

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

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

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

section
=======

subsection
----------

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

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

'''bold'''

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

*bold*

''bold''

''italic''

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

_italic_

//italic//

{+underlined+}

Depending on plugins:
_underline_
__underline__

<u>underline</u>

__underline__

@@monospace@@

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

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

{{{monospaced}}}

{-strikethrough-}

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

<strike>strikethrough</strike>

--strikethrough--

'^superscript^'

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

<sup>superscript</sup>

^^superscript^^

'_subscript_'

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

<sub>subscript</sub>

~~subscript~~

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

http://example.com/pic.jpg

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

%ATTACHURL%/image.png
http://any.domain/image.png
%IMAGE{"image.png"}%

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

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

no example known

| left |   center   |   right |
or HTML
or CSS

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

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

Depending on plugins:
> text

[quote]
text
[/quote]

: one
:: two

<blockquote>
multi line text
</blockquote>

:indent

> quote

<<<
blockquote
<<<

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

* one
** two

* 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

Depending on plugins:
1. one
2. two

# one
## two

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

# Item 1
## Item 1.1
# Item 2

: term : definition

Depending on plugins:
; term: definition

$ Term: Definition

; term
: description

----

Depending on plugins:
----

---

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