It's been a little over a week since Microsoft unveiled its big Office 2013 suite (along with that Office 365 subscription option) to the world, and right on cue the Document Foundation has released version 4.0 of open source alternative LibreOffice. The latest update promises to be cleaner and leaner according to devs, but more importantly to you and me is that it brings greater interoperability between different file formats such as DocX and RTF documents. It also integrates better with content and document systems like Alfresco, IBM FileNet P8, OpenText and Microsoft Sharepoint 2010. Other notable improvements include an Android app for controlling presentations, several new features to the Calc spreadsheet app (like chart exports and ODF OpenFormula functions), UI upgrades and a performance boost across the board. For a full run-down on what the new LibreOffice can do, have a gander at the source or download it yourself at the rightmost link.