Have an event coming up? Add some pizazz to your booth's video screen with this cool streaming app. Upload a background image, pick keywords, choose your sources (Twitter, Flickr, etc) and you’ve got a custom live slideshow.

This free service monitors your website every five minutes and alerts you if it's down via email, SMS, RSS or Twitter.

Want to preview photos when you receive a Flickr link, or see the contents of an email without opening it? Add a host of innovative features to your Gmail account by visiting Gmail Labs and enabling features that appeal to you.