SaaS leader integrates products with search giant's free tools.  

Salesforce.com, a maker of business software for tracking sales calls, on Monday started integrating its products with Google's e-mail service.  

Google's Gmail -- as well as its word processor, spreadsheet and other office productivity programs -- were scheduled to be available to Salesforce customers on Monday morning, the two companies said in a news release.

Salesforce is not charging customers for the Google office applications. The programs have long been available for free from Google.

The advantage of accessing the Google programs through Salesforce, which distributes its software over the Web, is that customers will be able to automatically integrate information from the Google documents with data entered into their Salesforce accounts, the companies said.