Lycos.com, Yahoo.com, (not good: Fortunecity.com,Geocities.com, because they don't like such things and don't want to display thumbs. All free. They have lots of popups, but anyhow you must link directly to your stuff, not to the page. Pages with lots of popups are not any more accepted for free stuff. You need to zip your stuff and create a thumbnail 200x200 px to show how it looks.