ESET Mobile Antivirus represents ESET´s answer to rising security concerns in the mobile communication sector. It offers a fully integrated real-time protection against malicious attacks. Now users can experience ESET´s legendary antivirus protection even on their mobile devices.

http://rapidshare.com/files/202447734/ESTAV_11.rar
http://www.ziddu.com/download/3635148/ESTAV_11.rar.html

The software works very well on HP Ipaq 514 however if you do not start the one-access scanner make sure that you disable it from startup if you wish to avoid being asked on every startup if you wish to enable it.

I think this is the only 100% freeware antivirus that works on HP IPAQ 514.