Antti Karttunen's PDP-11 page
Contains GLAD (Generic Lisp Assembler/Disassembler).
pdpxasm
PDP-11 cross-assembler, cross-linker, and cross-disassembler run under DOS, by Strobe Data Inc.
VMS Disassemblers Package (V00238)
By Claus Calle, Andy Pavlin and others .
VMS Freeware
Contains DISM32 VMS Disassembler by Andy Pavlin, and UNMACRO Interactive disassembler for VMS by Robert Chojnacki.