[Rockin Robbins]

Both Open Office and Libre Office are branches off the same tree and very similar. I find that Open Office has a higher variety of import filters, which occasionally is important to me. I have them both installed for when I infrequently find a function I need in one but not the other. They both use the open document format (MUCH better than Microsoft's proprietary formats) so changing back and forth is seamless and 100% compatible--just like any two computer programs should play nice with each other.