Summary: The flexibility inherent in Salesforce.com`s namesake service gives companies not only a way to build new applications but also an opportunity to integrate existing applications into their sales processes and build new processes for the Salesforce.com application. Here, we look at three applications that use different methods to integrate with Salesforce. All three tap into the flexibility of the service, either to allow companies to move data into or out of Salesforce or to embed new applications directly within it. By Michael Caton, eWEEK