This sofware is currently in alpha.
Hadaly is a presentation software allowing to manipulate slides, in various ways during presentation. The goal is to offer a practical presentation software for art historians or any other individual who wants to have a bit more interaction with their presentations.
It contains a presentation editor and a viewer. The editor allows you to build presentations by creating slides from pictures and by adding information about them (e.g: artist, title and year). And, well, the viewer allows you to show and manipulate the slides.
Presentations are saved as *.opah files which contains all the slides image files and their metadata (JSON format).
Installation instructions and user manual can be found at : http://hadaly.readthedocs.org/
Hadaly is released under the terms of the GPLv3.