Can any one suggest me the integration document of Netiq Access Manager which is useful for SAAS Application integration.
Which SaaS application? There are several common ones in the documentation. There are even more in the archives of this site. Many of the common ones are in the application/connector library. Check to see if your app is there.
The application catalog can be accessed from the Dashboard by selecting Applications on the left and then selecting the + and "Add Application from Catalog"