Great content makes your site more interesting and informative. These all share the technique of using content from another web server that displays in a window or as a widget. Check out these cool examples that are fast easy to add to your site.
Google Maps
A must if you are a local business, you can embed a map view or street view so people can see where your business is. I've chosen the local Fry's Electronics as an example. You will notice that the driving directions link is in the bubble. You should also list your business on Google maps where it will show up in searches. Google Maps even has a customize button for controling the size of your map.
YouTube
Youtube allows us to embed code for videos that are on their excellent fast server. Just like the Google Maps, you can put any YouTube video on your web page. If you have video you want on your site, it can be uploaded to YouTube and then embeded on your page. As a sample, I've chosen this video tutorial for Google Webmaster Tools:
Widgets
There are many other cool widgets you can embed for free to add value to your website. Weather, current time, search engines, and others are great ways to add value to your site. There are many sites where you can get widgets. These are from Your Minis.
GRAPHICS
