INDI GPUSB driver is included with libindi v0.9.6+
Features
Provides basic auto guiding interface.
Operation
Usually the user doesn't control this device directly, but instead uses a client software (such as Ekos) to perform autoguiding and sends pulse commands to the mount using GPUSB.
Issues
There are no known bugs for this driver. If you found a bug, please report it at INDI's bug tracking system at SourceForge. (You can log in with a variety of existing accounts, including Google, Yahoo and OpenID.)