Want to save some money and not spend a lot on software? Most of the following software is free.
Free personal / home use Anti-Virus / Anti-Spyware: AVG and Avast are both excellent. Both include anti-virus and anti-spyware.
Free Productivity Suite: Open Office is an excellent productivity suite that includes word processing, spreadsheet, database, presentation and drawing software. The default extension for each component is selectable. You can even save documents as pdf files.
Free Graphics Editor: Gimp is an excellent graphics editor that is more than adequate for most editing projects.