Windows driver examples

No more copying large ISO files around? 

HttpDisk is a virtual disk driver for Windows that uses HTTP to mount disk or CD images from a web server.
Latest news: Support for persistent connections to improve performance.

Source: Windows driver examples

Plus, a virtual disk drive file, basically TrueCrypt without the encryption.  Useful for maintaining drive letters between systems, and possibly as a siloed work area for source control systems.

FileDisk is a virtual disk driver for Windows NT/2000/XP that uses one or more files to emulate physical disks. A console application is included that let you dynamically mount and unmount files. An example of use for this driver is if you have made plans spending the weekend writing an RAID driver for NT but find you are short of disks. FileDisk can also use CD-images.