Probably the two main "Integrated Tools" are Microsoft Office and LibreOffice. Microsoft Office can be obtained by paid subscription or one time purchase. LibreOffice is free but donations are appreciated. Word processing and the spreadsheet are the most useful tools.
Microsoft Office
Microsoft Office is a collection of productivity software applications developed by Microsoft, including programs like Word, Excel, PowerPoint, and Outlook, designed to help users create documents, spreadsheets, presentations, and manage emails. It is widely used in both personal and professional settings for various tasks related to communication and organization.
LibreOffice
LibreOffice is a powerful, free and private office suite - the successor project to OpenOffice - used by millions of people around the world. It's compatible with Microsoft Office (365) and is backed by a non-profit organization, The Document Foundation. LibreOffice includes Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (vector graphics and flowcharts), Base (databases), and Math (formula editing).