Vimalin is a backup program for your virtual machines in VMware Fusion. It is an easy way to make sure your virtual machines are safe.
Having backups is important. Unfortunately Time Machine is known to be a problem with Virtual Machines.
It is easy to schedule a backup of your virtual machine. So you will not forget to make it.
You do not have to install anything in your Virtual Machine and the VM does not have to shut down for it to work.