What are different user licenses available in salesforce and explain them?

Hi saurabh,

Following are the various types of Licenses:

Salesforce
Full access to standard CRM and Force.com AppExchange apps.

Salesforce Platform
Access to custom apps but not to standard CRM functionality.

Force.com – One App
Not available for new customers, this is designed for users who need access to one custom app but not to standard CRM functionality.

Force.com App Subscription
Access to a Force.com Light App or Force.com Enterprise App, neither of which include CRM functionality.

Knowledge Only User
Access to the Salesforce Knowledge app only.

Identity
Access to Identity features such as the App Launcher, included with all paid user licenses in Enterprise, Performance, and Unlimited Editions.

Chatter Free
Access standard Chatter people, profiles, groups, and files without a Salesforce license at no additional cost.

ChatterExternal
Allows your clients access to chatter groups at no additional cost.

Chatter Only (Chatter Plus)
Designed for Performance, Unlimited, Enterprise, and Professional Edition users that don’t have Salesforce licenses but need access to some Salesforce objects in addition to Chatter.

Work.com Only User
Available in: Developer; Enterprise; Professional; Unlimited Editions. Designed for users who don’t have a Salesforce license and need access to Work.com.

Company Community
Available in: Developer; Enterprise; Unlimited Editions gives access Force.com Light application custom objects, custom tabs, Chatter (people, groups, feeds, files), and aCommunity that includes a Site.com site.

To view a list of the active user licenses in your Salesforce, simply click Your Name > Setup > Company Profile > Company Information > User Licenses.

Thanks.