Let me suggest you for instance FlowSort (for ordered classes) with extensions for imprecise information and group decisions ; AHP Sort ; PROAFTN (for nominal classification ; UTADIS ; TRINOMFC ; PairClass
For more information about sorting methods let me refer you to my thesis: http://theses.ulb.ac.be/ETD-db/collection/available/ULBetd-11282008-095227/unrestricted/Nemery_Philippe_PhD.pdf as a first start (though new methods have been published )