Arena is a FREE available Graphical User Interface (GUI) for chess programs (engines) by Martin Blume. Arena runs on Win95, NT4 or higher Microsoft OS versions. Arena is compatible to Winboard protocol I, II and UCI protocol I, II. Furthermore, compatible to Chess960, DGT electronic chess board & DGT clock XP, Autoplayer, ICS (chess server) and much more graphics (1280 x 1024).

BabasChess is a new revolutionary Internet Chess Client for Windows. It combines ease of use with powerful features for advanced users; integrates a fast and customizable playing environment with a powerful PGN viewer/editor, chess engines support for analyzing positions and amusing chat features.
BabasChess is totally free and supports many different languages: Croatian, English, French, German, Italian, Polish, Portuguese, Spanish.

BlitzIn is a Windows program that shows you a chess board and lets you connect and play on the ICC. BlitzIn was the main Windows interface for ICC before Dasher and is still popular with many long-time members, especially those who prefer a command-line interface and are prepared to spend the time necessary to learn it. Unless you are already familiar with BlitzIn and prefer it, we highly recommend that you start with Dasher instead, which is easier for most new members to learn.

Chess Client v2.0 is a graphical interface for playing chess on the internet chess servers, FICS (Free Internet Chess Server) and ICC (Internet Chess Club). CClient and its source code have been released into the public domain. The author waives any and all copyright protections. No more updates will be available.

iNemesis is a graphical interface for playing chess on ICC and FICS servers. Based on CClient has a completely new user interface and offers many more features.

The JavaBoard is an easy to use interface for the American Free Internet Chess Server! This client is especially geared towards new users. More experienced users may find downloading an interface to connect with a better option, as it will offer more features.

Jin is an open source, cross platform, graphical client (interface) for the Internet Chess Club and the Free Internet Chess Server. It currently supports ICC and FICS but is designed to be able to support any chess server.

Thief is a popular interface for Internet Chess Servers at Chess Live (www.chess-live.com), the Free Internet Chess Server and the Internet Chess Club. It was optimized for bughouse support. It is also known to be one of the fastest interfaces, supporting true premoving and other speedy features.

XBoard and WinBoard are graphical user interfaces for chess. They display a chessboard on the screen, accept moves made with the mouse, and load and save games in Portable Game Notation (PGN). They serve as front-ends for many different chess services, including:

Chess engines that will run on your machine and play a game against you or help you analyze, such as GNU Chess, Crafty, or many others. A list of compatible engines is available.
Chess servers on the Internet, where you can connect to play chess with people from all over the world, watch other users play, or just hang out and chat. A list of compatible servers is available.
Correspondence chess played by electronic mail. The CMail program (which works with XBoard only) automates the tasks of parsing email from your opponent, playing his moves out on your board, and mailing your reply move after you've chosen it.
PGN viewer. You can use XBoard or WinBoard as a viewer and creator for game files recorded in PGN (standard chess notation).