There was one other Cygnus-era one... libgcj, the gcj runtime library. However, Red Hat assigned copyright to the FSF in exchange for them adopting a more perm

There was one other Cygnus-era one... libgcj, the gcj runtime library. However, Red Hat assigned copyright to the FSF in exchange for them adopting a more permissive license for the GNU Classpath project; one that was eventually selected by Sun when they open-sourced Java.