You can safely embed any external HTML code on your pages. To guarantee maximum safety, HTML code is placed in a safe environment (iframe sandbox) to limit the possibility of cross-site scripting attacks.

E.g. to display del.icio.us tag cloud as generated from http://del.icio.us/help/tagrolls simply wrap the html code in a [[html]]…[[/html]] tags:

[[html]]
<script type="text/javascript" src="http://del.icio.us/feeds/js/tags/michal_frackowiak?icon;size=12-35;color=87ceeb-0000ff;title=my%20del.icio.us%20tags"></script>
[[/html]]

Note: previously [[html]] tag functionality was partly covered by the [[embed]] tag, which is now deprecated and aliased to [[html]]. This is why you might still find [[embed]] tag here and there.

Examples of supported media using [[html]] tags:

Video & Audio

YouTube video
Google Video
Vimeo videos (HD) - more?
DailyMotion videos - more?
GameTrailers Video (HD) - more?.
Animoto
Flickr videos - more?
TeacherTube videos - more?
SchoolTube videos - more?
Blip.tv videos (HD) - more?
Playlist.com music player - more?
FineTune player

Images

Photobucket photo widgets - more?
Picasa web albums - more?

Office Tools

Zoho Polls - more?
Zoho Writer - more?
Zoho Show - more?
Zoho Sheet - more?
EditGrid - more?
Instacalc - more?
Quimble polls - more?

Slideshows & Presentations

Voicethread slideshows - more?
SlideBoom slideshows and presentations - more ?

Maps

Google Maps - more?
Wikimapia
Quikmaps maps - more?
EveryTrail
MotionBased

Social services

NEW! Disqus
TweetMeme
AddThis
del.icio.us tagrolls
del.icio.us linkrolls
del.icio.us tagometer
del.icio.us "Save this page" - more?
Digg news - more?
spreadfirefox.com affiliate buttons
Ohloh snippets - more?
Meebo Me IM chat window - more?
Gabbly multi-user chat - more?
WOWDB, Wowhead, Thottbot tooltips - more?
MyBlogLog widget - more?

Widgets

Google Gadgets - more?
Google Calendar - more?
Widgetbox Widgets - more?
JS-Kit ratings - more?
Labpixies gadgets - more?

Web Tools

StatCounter tracking code - more?
Alexa.com traffic ratings - more?
Feedburner - more?
FeedBlitz
Babelfish translation - more?
Skype - "call me" buttons
Brainy Quote - quote of the day
Cornify - don't even ask :) more?

If you want a new service enabled, please write to moc.todikiw|troppus#moc.todikiw|troppus or put your suggestion in our Community Forum.