The following review written by one of the Software Informer contributors applies to version 1.5
OpenSong 1.5.1 is a program to manage lyrics, chords, lead sheets and projections. This program was specially developed to fit the needs of Christian churches. The songs library that´s bulked with the program contains Christian songs only.
There are versions of OpenSong available to run on Windows, Mac OSX and Linux. By using this program you will be able to prepare sheet with lyrics and chords, in order to print them and distribute them between the people in a church. You can include tempo, keys, signatures and lyrics, among with other information you wish to include. You will also be able to build a slide show with the lyrics of the song you will be singing, along with inspiring background images. You can choose the images you want to include, as well as the seconds that the image will stay on screen, the transition effect it will use when appearing and disappearing. You can, of course, choose the order in which the slides will be shown. In the developer´s page you will find links to download more songs, and some extra tools to be used with this program, such as language packs and other utilities.