LibreOffice

As the name implies, LibreOffice is a free of charge alternative to other office suites. Most types of files can be implored and exported - including MS Office files for example (see Feature Comparison: LibreOffice - Microsoft Office)

LibreOffice is a powerful office suite – its clean interface and feature-rich tools help you unleash your creativity and enhance your productivity. LibreOffice includes several applications that make it the most powerful Free and Open Source office suite on the market:

• Writer (word processing)
• Calc (spreadsheets)
• Impress (presentations)
• Draw (vector graphics and flowcharts)
• Base (databases)
• Math (formula editing).

Full documentation is available from the LibreOffice Web Site and a very compehensive list of all LibreOffice Documentation and Publications can be downloaded from The Document Foundation Wiki together with a series of Video Tutorials.