ZoneAlarm's got so many technical issues at times so I keep away from it, Sygate was bought by Norton a while ago so its future is unclear. Kerio or Agnitum would be more viable choices in my opinion. avast! 4 Home Edition is the best anti-virus software for Win I know of.
Other softwares worth mentioning:
- 7zip, better than most file compression/extraction tools.
- Daemon Tools, no burning capabilities but mounts cd/dvd images efficiently.
- FeedReader, good tool to keep you up-to-date with a lot of RSS/ATOM feeds.
- FileZilla, maybe the best ftp client software for Win out there.
- FileZilla Server, efficient ftp server.
- Firefox, you all know this.
- Irfanview, good for quick viewing of different image files.
- Microsoft Antispyware, is old GIANT Antispyware, beats Ad-Aware along with most other free malware removal tools. Also got real-time protection for the most paranoid of you.
- Media Player Classic, get this with ffdshow and vsfilter and you have nearly all media playpack covered.
- OpenOffice, good alternative for MS Office.
- PageDefrag, boot-time defragger that defrags files that cannot be defragged while Windows is running.
- PuTTY, you all should know this. One of the best telnet/ssh clients.
- Thunderbird, you all know this.
- Trillian Basic. Version 3 Basic is very good, covers AIM, ICQ, MSN, Yahoo and IRC.