Wikipedia
OpenLP
OpenLP is a worship presentation program licensed under the GNU General Public License. It includes the ability to search through lyrics for certain words, search for Bible verses in the Bible, display lyrics and Bible verses in a friendly way to the congregation and interact with popular presentation programs to provide users with an easy way to control a presentation (with LibreOffice Impress, OpenOffice.org Impress or Microsoft Powerpoint). It also includes easy and instant switching between slides, customisable backgrounds, a song database, and video support.