LibreOffice is a powerful all-in-one office suite that combines pretty much everything you need to increase workflow productivity. Also available as an installer.
It embeds several applications, including Writer, word processor, calculator, spreadsheet application, Impress, presentation engine, drawing, drawing, flowcharting application, base able-bodied database and database front end, and Math for editing mathematics. With ease, you can create HTML files, tables, etc., and the suite will also work with ODF (OpenDocument Format).
LibreOffice is also expandable with add-ons or extensions.