Lychee is a free photo-management tool, which runs on your server or web-space. That's usually the best option, as hosting your images in a remote service leaves you at the expense of the owner of that service. Lychee fills that gap in the market beautifully, using a snappy and beautiful interface and very little resources. I find really interesting the concept of "smart albums", that organize your pictures in special albums (apart from your regular albums) depending on specific criteria, like the amount the stars received.
There's another really good thing about Lychee, and that's how easy it is to install it. It uses PHP, so you don't need a high-end server to run it, so that's great. Review collected by and hosted on G2.com.
Lychee's elegancy and simplicity is also its weaker point. It lacks a user management system, it would be great to be able to share albums with other people. Also, the development process and release cycles seem a little bit slow. Review collected by and hosted on G2.com.