ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.
ITM Platform - Cloud-based Project Management Solutions
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Workfront - Award winning project management software helps you manage projects in one place. A cloud-based work management tool for marketing and IT teams.
WPS Office - Would you need Office Word, Excel or PowerPoint for Home, business or School? WPS.com would give you right version for you.
Planisware - Planisware PPM software supports NPD and R+D processes to help organizations make confident business decisions.