I love the whole idea of no-fee software (freeware). Here is a list I compiled for my daughters who were not willing to buy PhotoShop (TM) from their allowance.
This software is written by a world-wide network of expert programmers.
There is no need to pay for just about any program. Here are a few examples:
Open Office (MS Office)
Cakewalk and others (Audacity)
Android (iOS such as Apple iPad, iPhone, and iPod),
Firefox ( MS Internet Explorer)
Dia (MS Visio)
Kexi (MS Access)
Inkscape (Adobe Illustrator or Corel Draw)
Blender (3D and animation such as TruSpace)
Sigil (EPUB) http://code.google.com/p/sigil
To find more go to: http://whdb.com/2008/the-top-50-proprietary-programs-that-drive-you-crazy-and-their-open-source-alternatives/