webODF is a nicely done ODF editor. Owncloud uses this in their own online document editing addon.<p><a href="http:&#x2F;&#x2F;www.webodf.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.webodf.org&#x2F;</a><p>The other really good one (which has been around for a while) is OX Documents:<p><a href="https:&#x2F;&#x2F;www.open-xchange.com&#x2F;en&#x2F;ox-documents" rel="nofollow">https:&#x2F;&#x2F;www.open-xchange.com&#x2F;en&#x2F;ox-documents</a>