A free client for playing chess on the internet
http://thief.sourceforge.net/The latest release is Thief 1.25 from May 10, 2011.
New features and changes added to Thief include:
New Layout for "Window -> Try Window layout": "Observe eight games"
no more disconnections because of illegal characters sent to timeseal (proper ASCII filter)
minimize to tray
easier multiple command option for partner communication buttons
password prompt option for registered accounts (if password is not saved in the profile)
Bughouse Clocks can show which teams are up/down on time ("Preferences -> Game Configuration -> Clock Display -> Colored Bughouse Clocks"), colors are configurable in "Preferences -> Game Configuration -> Board Appearance"
Fully configurable Silence Mode ("Preferences -> Customize Silence Command")
Optional time display in console and/or log files: "Preferences -> Telnet Console Options" (Show time in Console/Show time in Console log)
Win NT/2000/XP/Vista/7 conformity: Folder BUGSTUFF and all folders/files requiring write access are now located in subfolder THIEF of user document folder.