I can find several guys that are sitting on NBA benches, inactive lists, and D-League teams, without mentioning the out of work Keith Van Horn, Vin Baker, and Brian Grant.
A few guys with minimal statistics or none at all listed as on NBA team that could be traded for or would potentially become available later in the season are:
Your boy Max.
Brandon Bass
Mark Madsen
Maurice Taylor
Nikoloz Tskitishvilli
Sean Marks
Brian Scalabrine
Danny Fortson
Othella Harrington
Pat Burke
Pat Garrity
Malik Rose
Bo Outlaw
Darius Songaila
Melvin Ely
All of these guys are experienced and for one reason or another are not playing or are on inactive lists.
I'm having a tough time finding the guys who are with no teams at this point. They are likely playing small ball and dont keep a list. I think most teams would make an effort to get most of these guys over RM.