(There's no video for LibreOffice 220.127.116.11 MacOS X PPC yet. Please contribute to MR and add a video now!)
LibreOffice is an excellent MS Office clone, except it's open source and so, it's free.
LibO_3-6-7-2_MacOS_PPC_install_en-US.dmg (161.64 MiB / 169.49 MB)
Main package, english / DMG image
LibO_3-6-7-2_MacOS_PPC_langpack_de.dmg (19.64 MiB / 20.59 MB)
German language pack / DMG image
Max OS X 10.4 PPC
Emulating this? It should run fine under: QEMU