distributions included IcedTea 6, based completely on free and open source code. Fedora 9 was the first version to be shipped with IcedTea6, based on the OpenJDK6 sources from Sun rather than OpenJDK7.
IcedTea 6 was part of the distributions, built solely on free and open source code. Fedora 9 was the initial release to include IcedTea6, using OpenJDK6 sources from Sun instead of OpenJDK7.