[url=http://example.com]Click Me[/url] -> Click Me!
                 [url=http://example.com]               -> http://example.com
Image:           [img=http://example.com/flower.jpg]      (Nicer syntax)
                 [img]http://example.com/flower.jpg[/img] (Alternative syntax)
Center:          [center]Stuff[/center]
                 [centre]Stuff[/centre]
Italicize:       [i]Hello[/i] -> Hello
Embolden:        [b]Hello[/b] -> Hello
Underline:       [u]Hello[/u] -> Hello
Strikethrough:   [s]Hello[/s] -> Hello
Indent:          [indent]Hello[/indent]
Horizontal Line: --- (3 or more hyphens)
Quote:           [quote=Mahz]Hello[/quote] (Named quote)
                 [quote]Hello[/quote]      (Unnamed quote)
Hider:           [hider=My Spoiler]Some secret stuff[/hider]
Unordered List:  [list]
                 [*]Item A[/*]  (Yeah, need the [/*] for now)
                 [*]Item B[/*]
                 [*]Item C[/*]
                 [/list]
Numbered List:   [list=1]
                 [*]Item A[/*]
                 [*]Item B[/*]
                 [*]Item C[/*]
                 [/list]
Youtube          [youtube]GRbD4g3hshw[/youtube] (http://www.youtube.com/watch?v=GRbD4g3hshw -- Just the code after the ?v=)