You want to read VMS ODS5 and ODS2 disks from your Linux box? Here's a kernel module implementing the ODS5 file system: just mount the disk and access the files.
You want to read files from a VMS ODS2 disk on your Linux box? Here are some tools.
You copied a VMS file in binary mode to W2K and need to read it based on the (RMS) record attributes? Here's a tool.
You want to get some information out of your VMS objects and images? Here are the VOIT tools, VMS Objects and Image Tools for Alpha and Integrity.
You want to decompile VMS message files? Here is C source code for the UNMSG tool, which can do that for nonexecutable message files from all VMS platforms.