Friendica has support for BB Code.
Here is a list of the currently supported ones.

• [b]bold[/b] - bold
  
• [i]italic[/i] - italic
  
• [u]underlined[/u] - underlined
  
• [s]strike[/s] - strike
  
• [color= red]red[/color] - red
  
• [url=http://www.friendica.com]Friendica[/url] - Friendica
  
• [img]http://friendica.com/sites/default/files/friendika-32.png[/img] - 
  
• [code]code[/code] - Y29kZQ==
  
• [quote]quote[/quote] - 

  quote

  
  
• [quote=Author]Author? Me? No, no, no...[/quote] - 
  Author wrote:

  Author? Me? No, no, no...

  
  
• [noparse], [nobb] and [pre] are used to escape bbcode.

 
You can make lists with:

• [list]
  
• [list=1]
  
• [list=i]
  
• [list=I] 
  
• [list=a]
  
• [list=A] 
  
• [ul]
  
• [ol]

For example:
[ul]
[*] First list element
[*] Second list element
[/ul]

Will render something like: 

• First list element
  
• Second list element

 
There's also:

• [hr]
  
• [video]
  
• [table]
  
• [th]
  
• [td]
  
• [tr]
  
• [center]

Tables? Yes!

[table border=1]
[tr]
[th]Tables now[/th]
[/tr]
[tr]
[td]Have headers[/td]
[/tr]
[/table]

Tables now
Have headers

All sizes,
From the [size=xx-small] - xx-small.
To the [size=xx-large] - xx-large.
To fit exactly 20px use [size=20].

Enjoy them!

PS: For a better experience with BB Codes, disable RichText mode with the Editplain plugin.