You could paste the code you get for a Google Gadget, a PayPal button, etc.

For example, using this code:

{HTML()} 
  TikiFest Montreal Mars 2009 fr.  from Régis Barondeau 
{HTML}

Will produce this presentation embedded in the page:

Embedding some html object from a site serving embeddable videos (youtube, vimeo, etc):

{CENTER()}{HTML()}{HTML}{CENTER}

However the plugin call was not validated by the admins but denied, and this is what it would produce:

Making a wiki link to look like a button of the same theme style that you are using. For instance, this code:

^{HTML()}Save changes with my custom buttom to the page PluginHTML, while you send also itemId in the url for PluginTrackerList magic, for instance (not used in this simple example){HTML}^

Would produce:

When the parameter wiki=1 is used, wiki syntax will be parsed in the content inside HTML plugin.

{HTML(wiki=1)} 
 This wiki syntax will be parsed to produce special characters:
* ''Some examples:'' ~amp~ ~lt~  ~c~
* __More examples:__ ~gt~ ~ldq~
* ~rdq~ ~lsq~
* ~rsq~
* ~--~ --  
{HTML}

produces:

There are others ways to include HTML in a page:

• Use the WYSIWYG editor. Note that Tiki will automatically filter potentially unsafe content.
• Enable the Allow HTML in Wiki Pages option. Note that Tiki will automatically filter potentially unsafe content.
• Use PluginJS to include JavaScript in a wiki page.

• PluginTrackerList