Sure there is. Just don't use it if you don't want to.
Again, use Tex, use LaTex. Google Docs (although I really dislike the cloud). Make .rtf files in WordPerfect if you really want to avoid Word.
I guarantee you, building RTF files is just about the most cross-platform thing you can do. Its supported by damn near everyone, Word, WordPerfect, OpenOffice, Abiword.
I mean, have you even tried not using a Microsoft Product? Its a hell of a lot easier than you're making it out to be.