Gallery app for someone on windows

[Lee3]

I am looking for a photo gallery app or web-based, preferably free, that friends can use to upload pictures to their own website. The man makes custom knives, and it would be nice for him to display them, but I do not want to be responsible to upload pics every time there is a new one. So, I need something simple they can use.
Needs to be something that can be used on a Windows XP machine, since that is what they have.
Thanks

[Ken Sp.]

Google Picassa
http://picasa.google.com/index.html#

[Lee3]

Thanks Ken