Collabora Productivity, of course with CollaboraOnline, offers the most powerful Cloud, Mobile and Desktop Enterprise Office Suite. Cross-device, fully Open Source, excellent interoperability
Free office suite – the evolution of OpenOffice. Compatible with Microsoft .doc, .docx, .xls, .xlsx, .ppt, .pptx. Updated regularly, community powered.
Collaborate for free with online versions of Microsoft Word, PowerPoint, Excel, and OneNote. Save documents, spreadsheets, and presentations online, in OneDrive. Share them with others and work together at the same time.