WindowMaker
Running multiple instances of xterm
Go to the Attributes menu -> Application Specific and select "No application icon" for XTerm.
Then right-click on the docked appicon and select settings. Change the Application Path with arguments section to:
/bin/sh -c "exec xterm &"
Or:
/bin/sh -c "exec gnome-terminal &"
Gnome settings
Create the following file if it doesn't exist and change it's permissions:
chmod 755 ~/GNUstep/Library/WindowMaker/autostart
Content:
#!/bin/sh
gnome-settings-daemon
hvclock
Go to the Attributes menu -> Application Specific and select "Start Hidden".