The MSZ-006 Zeta Gundam (aka Zeta, Ζ Gundam, ζ Gundam) is the titular mobile suit of Mobile Suit Zeta Gundam. Though the unit itself had many pilots throughout Zeta Gundam and Mobile Suit Gundam ZZ, it was most famously piloted by its designer, Kamille Bidan.
The XXXG-00W0 Wing Gundam Zero (aka Wing Zero) is a mobile suit that appears in Mobile Suit Gundam Wing and its sequel OVA/movie Endless Waltz. Though having many pilots during its lifetime, the unit was most famously piloted by the series' main protagonist Heero Yuy.
The MSN-02 Zeong (aka Zeong, mistranslated in dub as "Jiong") is a prototype mobile suit developed by the Principality of Zeon at the A Baoa Qu space fortress during the One Year War, the Zeong was built especially for Newtype pilots and was first piloted by the "Red Comet" Char Aznable.