A San Francisco company that builds mobile applications for cloud platforms has added three more apps for Salesforce CRM.

Appirio Inc, which sells its apps as customized solutions which are then owned by customers, says one of the applications delivers up-to-date marketing and sales content to online or offline mobile devices, another enables companies to measure where marketing content is being used and its impact while the third allows sales, marketing and executive teams to gather real-time feedback from customers.

They are part of Appirio’s Cloud Asset Library, which has more than 450 tools. One, for example, connects Gmail to Salesforce.

The applications are sold as a customized service to meet a customer’s needs, including branding. Apps are built on standard protocols like HTML5, and the customer then owns the app.

Pricing depends on the level of customization, a company spokesman said.

According to the company’s Web site, customers have included Toyota Canada, for which it build a human resources solution.