Windows Winboard and Xboard
You have found the way to Winboard and Xboard on Windows:
Beowulf - WinBoard and XBoard chess engine that runs on Windows, UNIX and Linux. Source code is available.
Delfi - A freeware engine.
Faile - A free engine runs with WinBoard and Xboard. The source code is also available under the GNU GPL software license.
Gargamella - An Italian engine. Includes downloads.
Golem - An engine.
Green Light Chess - Free program that plays chess, either with its own graphical interface, or using Tim Mann's Winboard program. Estimated ELO 2300.
Jim Ablett's Winboard Projects - Contains links of Winboard projects like MSCP chess engine, java executables, Pgn-Extract-XP.
Kiwi - Winboard and XBoard chess engine with opening book.
Thor's Hammer - Winboard chess engine in C++. Executable and source code available.
A Tribute to Winboard - An excellent page from a Winboard fan, that has everything from A to Z about Winboard.
Xadreco - XBoard, WinBoard and UCI compatible engine. Includes source code and e-groups.
XBoard and WinBoard - A graphic interface program. Includes news, FAQs, and downloads.
Xpdnt - Chess engine for Winboard/Xboard. Has basic opening book and adjustable hash size. Help build the largest human-edited directory on the web.