cuckooo is a KDE Part, which allows running OpenOffice.org in a Konqueror window.
* Shows (read-only) all document formats supported by OpenOffice.org.
* Can be embedded as a Part in Konqueror.
* Can run as a standalone application.
Really cool stuff!
Go and checkout the screenshots, which demonstrate viewing MS Word, MS Excel and MS Powerpoint files inline within Konqueror :-)