plugin to qualify lead only to contact but not opportunity,Account
http://developersintent.wordpress.com/2013/09/23/controlling-the-lead-qualification-process-in-crm-2013
for more details about Lead Entity Changes in Dynamics CRM 2013
http://www.pedroinnecco.com/2013/10/lead-entity-2013/
http://developersintent.wordpress.com/2013/09/23/controlling-the-lead-qualification-process-in-crm-2013
for more details about Lead Entity Changes in Dynamics CRM 2013
http://www.pedroinnecco.com/2013/10/lead-entity-2013/