Preferred Free Useful Tools

I'm using this tools for free:

1. Foxit Reader: The fastest PDF Reader (Windows/Linux).
2. CutePDF Writer: Virtual printer that allows any application with printing capability to generate PDF documents (Windows Only, Vista Compatible).
3. Avira AntiVir PersonalEdition Classic: reliably protects your private computer against dangerous viruses, worms, Trojans and costly dialers (Linux/FreeBSD/Solaris/Windows, Vista Compatible on April 2007). Support offline Virus Definition Update (Incremental VDF)
4. Zone Labs ZoneAlarm Basic PC Protection: Firewall blocks hackers and other unknown threats. (Windows 2000/XP)
5. Free Download Manager: Full-featured download accelerator and manager, and It's free. (Microsoft Windows 9x/ME/2000/2003/XP/Vista)
6. Eusing Free Register Cleaner: Eusing Free Registry Cleaner is a free registry repair software that allows you to safely clean and repair registry problems with a few simple mouse clicks. The Windows Registry is a crucial part of your PC's operation system. (Windows 9x/Me/NT/2000/XP/2003/Vista)

Enjoy them