From writing a note to creating a CV or Quotation these program will help you along

1 OpenOffice.org - The Free and Open Productivity Suite
OpenOffice.org: The Free, Open Source Office Suite

2 PagePlus – Free Desktop Publishing Software Download
PagePlus desktop publishing software free download.

3 STEEMA SOFTWARE S.L.
TeeChart-Office is a free charting and plotting tool intended for both the end-user and the developer.

4 Swiffbuilder, home of Powerbullet Presenter | Home
Powerbullet Presenter is small, simple to use and of course free. Use it to create presentations in the Flash™ format. You don't need any experience to create slick, animated presentations, and it has loads of functionality to get you up and running quickly. Simply type, click and drag. Entirely free, no ads, no catch.

5 Dia - GNOME Live!
Dia is roughly inspired by the commercial Windows program 'Visio', though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams.

6 AceMoney Lite - Free Personal Finance Manager
AceMoney Lite is a freeware personal finance manager. It has all the features of its big brother except multiple accounts management. As AceMoney, AceMoney Lite helps people organize and manage their personal finances quickly and easily. It supports all the features required for home or even small-business accounting needs:

7 Adminsoft Accounts, Free Accounts Software
Free accounts software. Freeware. Upgrades available for multi-user, multi-currency, and software for autotrade and cafe's and shop's

8 FET – Open source free timetabling software for automatically scheduling the timetable of a school, high-school or university
FET is open source free software for automatically scheduling the timetable of a school, high-school or university. It uses a fast and efficient timetabling algorithm. It is licensed under GNU/GPL. FET version 5 is released. You are encouraged to use it, because of the new much better algorithm. The new 5 series version seems to be very performant. It might be comparable to expensive timetabling software. The solution is usually obtained in maximum 5-20 minutes.

9 AbiSource - Open Source for the Desktop.
AbiWord is a free word processing program similar to Microsoft® Word. It is suitable for a wide variety of word processing tasks.

10 Word Place, Inc. - Home of Yeah Write, FUN Write, & Daily Grammar
Word Place Software, the home of Yeah Write, FUN Write, Dailey Grammar, Almost Perfect, Life Form, & AMClock. Word Place stives to bring inexpensive software without loosing value.