- CutePDF Writer - just brilliant, and its free!
- 7-Zip - best archive utility (in my books), and again, its free!
- IrfanView - very fast and very functional image viewing and editing
- FolderGuide - if you are still on 32 bit Windows, this is the best way to navigate folders (in my opinion)
- CCleaner - great way to clean up after yourself
- FileZilla FTP Client - open source FTP client
- FREE PDF Tools - these are simply awesome, and yet again, totally free!
That was just a shortlist. I may post some more in future. In the meantime, what are your favourite utilities? Feel free to comment and share them with all of us...