Who knows the gallery service for embedding photos?

Question

Slider

Hello!
The guys have a self-written site, there is no way to insert beautiful pictures in the form of a lightbox or some kind of gallery, but there are a lot of photos to insert ...
There must be some third-party services that will help with this ...
Googled, found only this - flickrslidr.com
maybe someone knows something like that. I would like a little more options - opening in full screen or zooming in, and most importantly, not to upload pictures anywhere .... so that they can still be taken from my place (google, dropbox, ftp, etc.)