TiddlyWiki vs. WackoWiki vs. TWiki vs. MediaWiki

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

[[InternalLink]] 
((InternalLink))
[[InternalLink alternate text]]
CamelCase

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

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

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

https://wackowiki.org
[[https://wackowiki.org WackoWiki]]
[[Wikipedia:WackoWiki]]

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

[http://example.org The title]

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

== Level 1 ==
=== Level 2 ===
==== Level 3 ====
===== Level 4 =====
====== Level 5 ======

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

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

''bold''

**bold**

*bold*

'''bold'''

//italic//

//italics//

_italic_

''italic''

__underline__

__underline__

<u>underline</u>

<u>underlined</u>

{{{monospaced}}}

##monospace##

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

<tt>monospace</tt>

--strikethrough--

--strikethrough--

<strike>strikethrough</strike>

<s>strikethrough</s>

^^superscript^^

^^superscript^^

<sup>superscript</sup>

<sup>superscript</sup>

~~subscript~~

vvsubscriptvv

<sub>subscript</sub>

<sub>subscript</sub>

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

((image.png))
file:image.png
https://example.com/image.png

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

[[Image:wiki.png]]

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

{html}<div align="right">{html}

%%(wacko wrapper="text" wrapper_align="center")
content%%

| left |   center   |   right |
or HTML
or CSS

<center>Centered</center>

:indent

> quote

<<<
blockquote
<<<

one
two

<blockquote>
multi line text
</blockquote>

: indented line

* Item 1
** Item 1.1
* Item 2

*one
**One-two
*two
*three

* Item 1
* Item 1.1
* Item 2

* Item 1
** Item 1.2
* Item 2

# Item 1
## Item 1.1
# Item 2

1. numbered List
1. numbered List-2
2.#8 numbered List, with break

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

# Item 1
## Item 1.2
# Item 2

; term
: description

{html}<dl>
<dt>Coffee</dt>
<dd>Black hot drink</dd>
<dt>Milk</dt>
<dd>White cold drink</dd>
</dl>{html}

$ Term: Definition

; term : definition

----

----

---

----