The wiki page lists all common Creole formats.
Additionally, on this page Creole formats are proposed which I list here for test and reference.
Underline
__underline__
underline
Monospace or Typewriter
##monospace##
monospace
Superscript
Text with ^^superscripted^^ parts.
Text with superscripted parts.
Subscript
This is ,,subscripted,, text.
This is subscripted text.
Indentation
This is a normal paragraph.
> This is an indented
> paragraph in two lines.
>> This is more indented.
This is a normal paragraph.
> This is an indented
> paragraph in two lines.
>> This is more indented.
Definition List
; First title of definition list
: Definition of first item.
; Second title: Second definition beginning on the same line.
; First title of definition list
: Definition of first item.
; Second title: Second definition beginning on the same line.
... probably still requires some css format changes to the <DL>, <DT>, and <DD> tags