binary logic just includes basics, so pretty useless however the javascript practical may be a little amusing.
picture gallery is a single html document that rebuilds itself with javascript to browse a gallery of pictures.
web page refresher able to use page to browse with and it provides periodical refresh functionality. Admittedly nothing new as Opera and other web browsers provide this. For browsers that don't this is an option.
object explorer provides you with the ability to search the object model of your browser by presenting you with a web page presenting the current objects properties.
web presentation provies a really simple way to perform a presentation over the web to effectively an unlimited audience.
slide show I put this together when I wanted my desktop wallpaper to periodically change, admittedly there's loads packages that do this however with MS Windows active desktop all you need is this.