Focuser Drivers
Astro-Physics GTO (4.1.25, combined telescope/focuser driver)

Updated 10-Sep-2008 to correct the installer (it now registers this driver's Focuser as well as its Telescope), no changes to driver itself. Installs a driver for the
Astro-Physics series of telescope mounts.
Lunatico's Seletek Focuser

Software and drivers for the
Seletek family of controllers. Separate ASCOM drivers are supplied for up to three simultaneous devices (focuser, rotator,
dome...).
Meade LX200 Classic and Autostar I (combined telescope/focuser, 5.0.3)

Installs a driver for the original
Meade LX200 ("classic") telescope mounts (including the 16"), as well as Meade telescopes that use the Autostar I (#495 and #497) controllers, such as the ETX and DS series. This driver provides both telescope and focuser interfaces each of which may be used by separate programs.
Do not use this with the LX200GPS, LX200R or the RCX400.
Meade LX200GPS and LX200R (combined telescope/focuser, 5.0.0)

Installs a driver for the
Meade LX200GPS and LX200R telescope mounts. This driver provides both telescope and focuser interfaces each of which may be used by separate programs.
Do not use this with the LX200 Classic or the Autostar I (#495/#497) controllers. It has been reported that this driver also works with the RCX400 except it doesn't allow access to its unique features.
MoonLite Focuser (also handles the Lacey EasyFocus and LazyFocus units)

Driver for James Lacy's
MoonLite focuser. This driver is also supposed to work with the old James Lacy EasyFocus and Lazy Focus units. Caution: the download page prominently features a standalone focus control program; the 32- and 64-bit ASCOM drivers are listed second and third.
Optec TCF-S Focuser Drivers

The button takes you to the
Optec, Inc. download page for their drivers. Optec
supplies and supports ASCOM drivers for their devices.
PC-TCS (combined telescope/focuser/dome 5.0.1)

Installs a driver for the
COMSOFT PC-TCS telescope control systems. This driver provides combined telescope, focuser, and dome interfaces each of which may be used by separate programs.
RoboFocus (3.0.9)

Installs a basic driver for the Technical Innovations
RoboFocus focuser.
Use this for most applications. The 3.0.9 update adds support for serial ports through COM32.
RoboFocus Control Program (5.2.0a)

Installs a combined control program and driver for the Technical Innovations
RoboFocus focuser. This is an updated RoboFocus Control Program with a built-in ASCOM driver. This new version (mid-2009) has the ability to create several drivers giving the ability to control multiple focusers on the same system. Unless you need this full-function program or the multiple drivers, use the basic driver listed above. Most programs such as MaxIm DL already have the needed focus controls built in. 5.0.2a corrects an uninstall problem if all three instances are not selected)
SmartFocus Focuser (4.0.1)

Installs a driver for the JMI
SmartFocus focuser.