13. WSO2

WSO2 is one of the open source mashup solutions. It offers data mashup service and a platform for creating, deploying, and consuming Web services Mashups. It provides some features like "Support for consuming and deploying services", "Automatic and UI-based generation of Web services artifacts", "Getting results various user interfaces as web pages, portals, e-mail, Instant Messenger service, SMS".

Read more at: http://wso2.org/projects/mashup