OpenSlides (openslides.dev)

OpenSlides (openslides.dev) is a free, open-source presentation studio that runs in your browser. Start from your notes, pick a look, and add motion backgrounds, kinetic type, live charts and interactive widgets. Then present live, narrate it in another language, or export a video, PDF or PowerPoint file. No account, and your decks stay on your device. - Builds a deck from your notes or a Markdown file, with or without an AI model - Motion backgrounds, kinetic type, live charts, maps and animated diagrams - Interactive widgets the presenter operates during the talk - Presenter view with notes, next slide and a timer - Narrate in your own voice or a browser voice, and dub into another language - Export as MP4 video, PDF or static .pptx - Optional AI with your own Anthropic, OpenAI or OpenRouter key, or a local model - Free and open source (MIT or Apache-2.0)