I have gallery installed on FreeBSD server. First installed I had some troubles with it, but having contacted Eric Kok (myPh3 developer), I'm enjoing it now. Check it up here: http://armag.info/gallery
1. You may just add a folder with photo for FTP - nothing else is needed. The album appears in gallery immediately, with thumbs.
2. Very accurate and elegant image browser. Slimbox is integrated.
3. Easy for use, setting and installation - every man can use it!