Basic Formatting tags:

• [b]bold[/b]
• [i]italic[/i]
• [u]underline[/u]
• [s]strikethrough[/s]
• [sup]superscript[/sup]
• [sub]subscript[/sub]
• [h1]Heading 1[/h1]
• [h2]Heading 2[/h2]
• [h3]Heading 3[/h3]
• [h4]Heading 4[/h4]
• [align=left|center|right]Aligned Text[/align]

Link tags:

• [img]url[/img]
• [img]site://_images/image.jpg[/img]
• [url]site://help/formatting[/url]
• [url=site://help/formatting]Link to BBCode docs[/url]
• [email]webmaster@shishnet.org[/email]
• [[wiki article]]
• [[wiki article|with some text]]
• >>123 (link to post #123)
• [anchor=target]Scroll to #bb-target[/anchor]

More format tags:

• [list]...[/list] or [ul]...[/ul] (unordered list)
• [ol]...[/ol] (ordered list)
• [li]List Item[/li] or [*]List Item
• [code]print("Hello World!");[/code]
• [spoiler]Voldemort is bad[/spoiler]
• [quote]To be or not to be...[/quote]
• [quote=Shakespeare]... That is the question[/quote]