/usr/bin/gift
/usr/bin/gift-endianize
/usr/bin/gift-extract-features
/usr/bin/gift-generate-inverted-file
/usr/bin/gift-modify-distance-matrix
/usr/bin/gift-one-minus
/usr/bin/gift-write-feature-descs
You may install this package on Debian with
apt-get
install gnuift