Slidesgo - An extensive catalog of free Google Slides themes and PowerPoint templates.
OpenLP - About OpenLP.
SlideModel.com - Create attractive presentations with our professional PowerPoint templates, slide designs, and themes. Use our PPT templates and slide designs to give unique appearance to your presentation.
EasyWorship - EasyWorship is an expansive worship presentation software that was designed for all kinds of parishioners. This program brings solid church media with audio and video to every place of worship, from the smallest to the biggest megachurches.
SlideTeam - Transform rough sketches, notes into professional PowerPoint presentations.
VideoPsalm - Free worship presentation software for churches,