/usr/bin/Calculator
/usr/bin/CurrencyConverter
/usr/bin/GSTest
/usr/bin/Ink
/usr/bin/md5Digest
/usr/bin/NSBrowserTest
/usr/bin/NSImageTest
/usr/bin/NSPanelTest
/usr/bin/NSScreenTest
You may install this package on Debian with
apt-get
install gnustep-examples