Here is a free Small Office Software Tool Kit for you. The OS could be Win-10 or Ubuntu.
LibreOffice - Enhance desktop productivity - A comprehensive, professional-quality productivity suite that you can download and install for free.
OpenOffice - Multilingual Office Suite - OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites,
WordWeb - English thesaurus and dictionary - A one-click English thesaurus and dictionary for Windows that can look up words in almost any program. It works off-line, but can also look up words in web references such as the Wikipedia encyclopedia.
Artha - English thesaurus on WordNet - A free cross-platform English thesaurus that works completely off-line and is based on WordNet.
Some of the tools are part of SOFT - Small Office Foss Toolkit. (my own acronym)
AbiWord - Cross platform Word processor
AbiWord is unique among word processors in its drive to become a fully cross-platform word processor. Our source code is carefully written so that AbiWord will run on virtually any operating system with a minimum of time spent on porting.
Gnumeric - Spartan Spreadsheet Software
Gnumeric is a spreadsheet, a computer program used to manipulate and analyze numeric data. Gnumeric can help you keep track of information in lists, organize numeric values in columns and rows, perform and update complex calculations by defining each step of the calculation and modifying particular steps subsequently,
thefreecountry.com: Free Programmers' Resources, Free Webmasters resources, free security and privacy resources.
Free Business and Office software - Listing of many free and opensource office tools. Even Web Apps for Office is being added, This is a professionally made list by the creator of Treepad a versatile text snippet organizer.
The Quick Reference Site - A huge pile of documents that deal with almost every aspect of software development. The purpose of this site is to centralize this information and to make it available to everyone who may need it.
calibre - E-book management - A free and open-source e-book computer software application suite which runs on multiple platforms, allows users to manage e-book collections as well as to create, edit, and read e-book