LibreOffice is a free and open-source office suite, a project of The Document Foundation. It was forked in 2010 from OpenOffice.org, which was an open-sourced version of the earlier StarOffice. The LibreOffice suite comprises programs for word processing, the creation, and editing of spreadsheets, slideshows, diagrams, and drawings, working with databases and composing mathematical formulae. It is available in 115 languages.
Writer: a word processor with similar functionality and file support to Microsoft Word or WordPerfect.
It has extensive WYSIWYG word processing capabilities, but can also be used as a basic text editor.
Calc: a spreadsheet program, similar to Microsoft Excel. It has a number of unique features,
including a system that automatically defines series of graphs.
Impress: a presentation program resembling Microsoft PowerPoint. Presentations can be exported as SWF files, allowing them to be viewed on any computer with Adobe Flash Player installed.