Here are some places where you can look for information about Hammer And WML Modules for 3D Slicer:

Forums
  1. open-discussion: General Discussion
  2. help: Get Public Help
  3. contact_information: HAMMER: grwu@med.unc.edu; WML: minjeong_kim@med.unc.edu
  4. hammer_faq: FAQ on using HAMMER modules in 3D Slicer