How to add Quick Look support for OpenDocument file formats?
There's a longstanding request for it at
https://issues.apache.org/ooo/show_bug.cgi?id=68600

And an early implementation is at http://eric.bachard.free.fr/mac/aquavcl/patches/aqua_February2008/quicklook/

To install, place OOoQuickLook.qlgenerator from that site into /Library/QuickLook and wait a few minutes for QuickLook to detect the new generator.