GIMP
If you have ever purchased and/or used Adobe Photoshop you know how powerful, complex and expensive this program is.
Gimp offers you an alternative that is almost as powerful, simpler and 100% free. It includes several tools like a cloning stamps, transformations, smart selections and several filters.
Download
Inkscape
Inkscape is probably the best alternative to Adobe’s Illustrator and again it might not have the full power of Illustrator but it is a free and open-source vector graphics editor; that can be used to create or edit vector graphics such as illustrations, diagrams, line arts, charts, logos and complex paintings, it also allows you to export/import different formats.
GenuTax
This is a multiyear tax software product for Canadian taxpayers.
I have personally used it and have found it to be great and easy to use.
GenuTax Standard is free, however, if you do find the software to be useful, they ask that you make a modest donation to support costs associated with the continued development.
LibreOffice
With several MS Office “on-line” alternatives such as: Google’s Docs, Microsoft’s Office Live and Zoho it is very easy to simply use any browser to create/edit your documents; yet for the more advance users LibreOffice is a great free open source suite actively supported by many developers.
Absolute PC Blog 