You can publish your activity on the internet for free, using a dropbox account.

More information on dropbox can be found in this pocket book, dropbox for educators.

Link to the widged files on dropbox: Content Slider on dropbox

The widged can be included in any page that accepts iframes:
<iframe src="http://dl.dropbox.com/u/24333779/exercist/testPage/activity_0/index.html" width="700" height="500"></iframe>