I don't know what .ODT stands for, but open office opens it for editing, and you can google for ODT viewer for a freeware viewer.
Wire Geek - Burning the weak and trampling the dead since 1979Wire Geek - Burning the weak and trampling the dead since 1979
Wire Geek - Burning the weak and trampling the dead since 1979Wire Geek - Burning the weak and trampling the dead since 1979