You will find excellent information in the websites below. Please note: Some of the information is very detailed, but the details are important in determining whether these programs are appropriate for you.
Department of Education IBR information >>
Department of Education Public Service Loan Forgiveness information >>
Equal Justice Works >> - an excellent resource with checklists, webinar
finaid.org >> - A thorough discussion of IBR and PSLF; includes IBR calculator; see also link at end of section to Prof. Phil Schrag's law review article on the topic.