Foxit Office Suite is a Free, Fast, and Effective Office Productivity Suite. It consists of four free and invaluable office productivity applications from Foxit and Kingsoft.

Foxit Reader

The Foxit Reader is a small, fast, and feature rich PDF viewer which allows you to open, view, and print any PDF file.
•Fast - read PDF files without waiting.
•Lightweight - PDF reader that is easily deployable and doesn't exhaust system resources.
•Secure - so you don't get infected with viruses and can keep sensitive information safe within your PDF documents.

Unlike other free PDF readers, Foxit Reader also includes:
•Easy to use collaboration features like the ability to add annotations to PDF
•Form filling
•The ability to share information with social networks

Kingsoft Writer

Writer is a word processor program that is compatible with Microsoft® Word® and includes a wide range of easy to use features such as:
•A large range of clip arts, charts, shapes and pictures
•Several text effects, such as shadows, 3-D effects, word art, outlines, emboss engrave and more
•Table insertion and management
•Cross-referencing functions
•Mail merging
•Multiple document viewing methods such as map, gridlines, ruler, and markup
•Document management

Kingsoft Presentation

Presentation allows users to quickly and easily create and edit professional and dynamic slideshows and is compatible with Microsoft PowerPoint®. Presentation provides:
•Simple navigation, clearly set-out toolbar and user friendly interface
•The ability to view the slides on two separate monitors at the same time via Double Screen Extended Mode
•The ability to convert slides to CD format, which enables the slides to be played on a computer that doesn't have Presentation installed
•A large number of slide effects to help you to create wonderful slides, such as flash, background sound, different animation effects, and more

Kingsoft Spreadsheets

Spreadsheet offers a wide range of easy to use features to create professional looking spreadsheets and analyze data and is compatible with Microsoft Excel®. Spreadsheets provide:
•The ability to open and save documents from a wide variety of formats, which saves money on software purchases while maintaining compatibility and high performance
•A large number of mathematical functions
•Encryption to protect your data
•Multiple shortcut functions to quickly handle data.

You can download it from here.