How do I remove the "Open With"context menu items caused by VMware Fusion?
In VMWare Fusion:


go to Virtual Machine->Settings, 
select Default Applications,
Uncheck Open your Mac files and web links using Windows applications
Repeat this for all virtual machines
Reboot your Mac


Now the Open With options for apps in your virtual machines should be gone. Personally as I don't like my VMs to creep into the guest OS I keep all checkboxes here unchecked.