6. Microsoft's Popfly

Microsoft provides a new mashup development tool called Popfly. Popfly is an easy to use and good looking tool. It provides rich user interface based on Silverlight. You can take photos, RSS feeds and various other information with popfly's mashup creator and personalize the view of the web by combining the data. It declares that you can create a mashup without writing a line of code and combine different web sites together for new creations.

Read more at: http://www.popfly.com/