Are you looking for VMware Tools? Maybe just curious where they come from?
Look no further than your ESX host under /vmimages/tools-isoimages. There you’ll find the .iso files that mount as images into the virtual CD-ROM tray when the “Install/Upgrade VMware Tools” command is passed to the ESX host for a particular VM or group of VMs.
What else is in /vmimages? Browse to the floppies folder and you’ll find vmscsi-1.2.0.2.flp which is the optimized BusLogic SCSI driver for Windows guests. Although this driver will work for all Windows guest types, it’s best used with Windows NT and Windows 2000. Windows XP, Windows 2003, and beyond achieve better performance using the LSI Logic SCSI driver (which by the way can be downloaded from the LSI Logic website by following this link)