Providing software-as-a-service to a plurality of clients includes: selecting a first virtual portal, determining a score for a first resource to generate a first scored resource, determining a set of scored resources, visually rendering the first virtual portal and the set of portal resources, visually rendering the set of scored resources, and selecting a scored resource from the set of scored resources to be associated with the first virtual portal by updating the resource association matrix with an identifier of the scored resource. The score is selected to represent a usefulness factor of the first resource. Each scored resource of the set of scored resources is selected to be different than each portal resource of a set of portal resources associated with the first virtual portal by a resource association matrix.