To build and run a great website you need to focus on what you're best and leave the rest to the pros. The Mashup Matrix is a collection of 60 useful services/applications you can use to improve your website. It includes everything from chat widgets to advanced video sharing tools. I've tried to rate these tools from 1 tor 3.
I hope that you find this list useful and that it helps you find new ways of improving your website. Let me know if you are missing a service in this list or if you think I've been unfair in my judgment.
P-M Nordkvist, pm.nordkvist@gmail.com
