Apache OpenOffice - is an open-source office productivity software suite. It is one of the successor projects of OpenOffice.org and the designated successor of IBM Lotus Symphony
Writer – A word processor similar to Microsoft Word
Calc – A spreadsheet similar to Microsoft Excel
Impress – A presentation program similar to Microsoft PowerPoint
Draw – A vector graphics editor comparable in features to the drawing functions in Microsoft Office
Math – A tool for creating and editing mathematical formulae, analogous to Microsoft Equation Editor or MathType
Base – A database management program analogous to Microsoft Access
Calligra Suite – is a graphic art and office suite by KDE
KDE – is an open community of friendly people who wants to create a world in which everyone has control over their digital life and enjoys freedom and privacy
Words - A word processor with the ability to import Microsoft Word documents
Sheets – A spreadsheet program, formerly known as KSpread and Calligra Tables
Stage – A presentation program, formerly known a KPresenter
Kexi – A visual database management front-end, similar to Microsoft Access
Plan – A project management application that can create Gantt Charts. Formerly known as KPlato.
Braindump – A notetaking and mindmapping application
Flow – A programmable flowchart program. Formerly known as Kivio
Karbon – A vector graphics editor, formerly known as Karbon14
Krita – A digital painting program with some image editing features. Formerly known as Krayon and KImageshop