Browse free open source Presentation software and projects below. Use the toggles on the left to filter open source Presentation software by OS, license, language, programming language, and project status.

  • Demo Series - Small Business Backup By Veeam Icon
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  • 1
    DxWnd

    DxWnd

    Window hooker to run fullscreen programs in window and much more...

    Windows hooker - intercepts system calls to make Win32 programs run in a window, to enhance application compatibility, to enhance video modes, to stretch timing and emulate CD disk data and audio tracks. It is typically very useful to run old Windows games.
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    4.8 out of 5 stars 88 Reviews
    Downloads: 5,798 This Week
    Last Update:
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  • 2
    DeckCraft

    DeckCraft

    Presentations and slide shows

    DeckCraft is an open-source presentation editor written in pure Rust as a clean-room reimplementation of familiar PowerPoint workflows. It can create slide decks with masters, layouts, themes, placeholders, shapes, pictures, tables, charts, notes, comments, and custom slide sizes. Presentation tools include transitions, animations, full-screen slide shows, and reusable formatting inherited from layouts and masters. The application can open and save PowerPoint files while also maintaining its own editable project structure. Every interface action maps to a stable command that scripts and AI agents can invoke directly. Automation is available through a command-line utility, JSON control channel, and MCP server. DeckCraft runs on macOS, Windows, Linux, FreeBSD, and the browser and is currently progressing through its alpha stage.
    Downloads: 282 This Week
    Last Update:
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  • 3
    OpenSong

    OpenSong

    Lyric projection and chord charts for church musicians

    OpenSong is a free software application for managing chords and lyrics sheets (lead sheets), presenting lyrics (and custom slides) using a projector, and much more! Great for worship leaders and musicians!
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    4.5 out of 5 stars 53 Reviews
    Downloads: 453 This Week
    Last Update:
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  • 4
    JFreeChart
    JFreeChart is a free (LGPL) chart library for the Java(tm) platform. It supports bar charts, pie charts, line charts, time series charts, scatter plots, histograms, simple Gantt charts, Pareto charts, bubble plots, dials, thermometers and more. *** JFreeChart has moved to GitHub: https://github.com/jfree/jfreechart ***
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    4.9 out of 5 stars 46 Reviews
    Downloads: 311 This Week
    Last Update:
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  • Paessler - Monitor Your Whole Network in Minutes Icon
    Paessler - Monitor Your Whole Network in Minutes

    Auto-discovery finds your devices and deploys pre-configured sensors instantly. No project plan required, just visibility from day one.

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  • 5
    Mermaid

    Mermaid

    Diagram and flowchart generation from text similar to markdown

    Mermaid is a JavaScript-based diagram and flowchart generating tool that uses markdown-inspired text for fast and easy generation of diagrams and charts. Forget about using heavy tools to explain your code. Mermaid greatly simplifies documentation with its simple markdown-like script language, and offers a great range of diagram and chart options. The latest version of Mermaid comes with a number of bug fixes and enhancements, as well as a new diagram type, entity relationship diagrams. Its range of available diagrams include flowcharts, sequence diagrams, gantt diagrams and more, with new ones continuously being developed.
    Downloads: 65 This Week
    Last Update:
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  • 6
    Chart.js

    Chart.js

    Simple yet flexible JavaScript charting for designers & developers

    Chart.js is a Javascript library that allows designers and developers to draw all kinds of charts using the HTML5 canvas element. Chart js offers a great array of simple, clean charts including animated and interactive versions. Chartjs is an easy way to include beautiful and engaging charts into your website for free.
    5.0 out of 5 stars 3 Reviews
    Downloads: 46 This Week
    Last Update:
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  • 7
    Bento

    Bento

    Bento, the office suite that fits in a file

    Bento is a local-first presentation tool packaged as a single self-contained HTML file. Each deck carries its own viewer, presenter, editor, fonts, images, charts, animations, and document data. It opens in a modern browser without an account or installer and rewrites its own embedded data when saved. The document model remains readable as plain JSON, making files portable, inspectable, and directly editable by AI agents. Bento includes morph transitions, speaker view, comments, motion paths, PDF export, and built-in interactive charts. Optional collaboration uses end-to-end encryption and a CRDT so offline edits can merge while the relay stores only ciphertext. An offline mode blocks updates and collaboration, while signed self-updates create a new file and preserve the previous copy for rollback.
    Downloads: 19 This Week
    Last Update:
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  • 8
    softProjector
    Наша цель это создать программу которая простая в использование, но мощная в своих возможностях. Our goal is to create a program that is powerful, yet easy to use.
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    5.0 out of 5 stars 14 Reviews
    Downloads: 66 This Week
    Last Update:
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  • 9
    ZedGraph is a class library, user control, and web control for .net, written in C#, for drawing 2D Line, Bar, and Pie Charts. It features full, detailed customization capabilities, but most options have defaults for ease of use.
    5.0 out of 5 stars 26 Reviews
    Downloads: 46 This Week
    Last Update:
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  • $300 Free Credits to Build on Google Cloud Icon
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  • 10
    Album Shaper strives to be the most friendly, easy to use, cross platform application for organizing, annotating, framing, enhancing, stylizing, and sharing your digital photos.
    5.0 out of 5 stars 5 Reviews
    Downloads: 49 This Week
    Last Update:
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  • 11
    anchorcastapp

    anchorcastapp

    Free AI-powered church presentation & live sermon display app

    AnchorCast is a free, open-source AI-powered church presentation desktop app for Windows and MacOS, built with Electron. Features: - Live Sermon Transcription — real-time speech-to-text via Whisper AI - AI Bible Verse Detection — automatically detects and displays verses from live sermons - Song Manager — display song lyrics on projection - Media Playback — images and video on projection screen - NDI Output — stream projection over local network - Remote Control — control presentation from any phone via Wi-Fi - Timer Display — countdown and service timers - Presentation Editor — create and manage slide decks - Theme Manager — customize projection appearance - Sermon Intelligence & Analytics Free for all churches. No subscription. Works fully offline. Built with love for churches everywhere by Kaitam Technologies.
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    5.0 out of 5 stars 1 Review
    Downloads: 100 This Week
    Last Update:
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  • 12
    CasparCG: Pro Video & Graphics Play-Out

    CasparCG: Pro Video & Graphics Play-Out

    Pro Video & Graphics Play-Out SW, proven in 24/7 broadcasts since 2006

    Playback and record video, graphics and audio to multiple screens via DVI/HDMI/SDI in SD, HD, 2K and 4K.
    5.0 out of 5 stars 5 Reviews
    Downloads: 38 This Week
    Last Update:
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  • 13
    LibVNCServer/LibVNCClient are cross-platform C libraries that allow you to easily implement VNC server or client functionality in your program.
    5.0 out of 5 stars 5 Reviews
    Downloads: 25 This Week
    Last Update:
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  • 14
    PDF Presenter
    An easy to use presentation software with focus on PDF documents. External display / projector presentations: PDF, images, text and whiteboard with annotations; intuitive user interface, optimal mouse and pen input handling.
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    4.2 out of 5 stars 5 Reviews
    Downloads: 37 This Week
    Last Update:
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  • 15
    Impressive
    Impressive is a program that displays PDF presentation slides with style. Smooth alpha-blended slide transitions are provided for the sake of eye candy, but in addition to this, Impressive offers some unique tools that are very useful for presentations.
    4.7 out of 5 stars 13 Reviews
    Downloads: 21 This Week
    Last Update:
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  • 16
    LinPHA is an easy to use, multilingual, flexible photo/image archive/album/gallery written in PHP. It uses a SQL database to store information about your pictures. It comes with a HTML based installer, so you don't need experience in setting up SQL
    5.0 out of 5 stars 6 Reviews
    Downloads: 21 This Week
    Last Update:
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  • 17
    PhotoFilmStrip
    PhotoFilmStrip creates movies out of your pictures in just 3 steps. First select your photos, customize the motion path and render the video. There are several output possibilities for VCD, SVCD, DVD up to FULL-HD. Creates animated slideshows.
    4.8 out of 5 stars 40 Reviews
    Downloads: 14 This Week
    Last Update:
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  • 18
    BDReader

    BDReader

    An e-comics reader featuring panels detection and comfortable reading

    BDReader is intended to be a comfortable comics reader. As a main feature, BDReader includes an auto panels detection on comics pages. It allows you to display the panels (or squares) of a comic page individually, in the reading order. It also offers a Preview page option, allowing you to preview each page before reading into details the different panels of the page as well as a page thumbnails view. BDReader supports classic comic book formats: CBR, CBZ, PDF (...) as well as images archives and image folders. If you like reading comics on your computer and are fed up with zooming/dezooming all time to have the right reading size, give it a try ! For a quick try: -Download and install BDReader -Launch BDReader and Open a comic file (pdf, cbr, cbz ...) -Switch to Panel mode (Navigation->Panel mode or press c) -Navigate through your comic using the left and right arrows or your mouse wheel See the Wiki for more information (any feedback appreciated)
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    5.0 out of 5 stars 2 Reviews
    Downloads: 22 This Week
    Last Update:
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  • 19
    Sikher

    Sikher

    Sikher gives you access to the Sikh Scriptures in multiple languages

    Sikher gives you access to the Sikh Scriptures in multiple languages. To this end, through the GurbaniDB project, we have made available the world's most accurate database of the Sikh Scriptures with 53 translations and 22 transliterations. We now have various open source projects hosted on GitHub here: https://github.com/sikher/ Three important projects include: Sikher for Mobile, Tablet & Desktop - https://github.com/sikher/sikher GurbaniDB - https://github.com/sikher/gurbanidb iGurbani - https://github.com/sikher/igurbani
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    5.0 out of 5 stars 2 Reviews
    Downloads: 22 This Week
    Last Update:
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  • 20
    PHPlot

    PHPlot

    A PHP class for creating graphs, plots, charts

    PHPlot is a PHP graphics class for creating charts and plots. It works with PHP5 and the PHP GD extension to produce PNG, GIF, or JPEG images. TrueType fonts (TTF) are optional, or built-in GD fonts can be used. The available plot types include: area, bars, line/points, lines, pie, points, squared, stacked-bars, and thin bar-line. Labels, tick marks, plot legend, and X/Y axes and more are all configurable. Images can be imported as a background, multiple graphs can be drawn on one image, and images can be saved to disk or returned to a browser.
    Downloads: 62 This Week
    Last Update:
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  • 21
    Draw Pen

    Draw Pen

    DrawPen is a simple screen annotation

    DrawPen is a free, open-source screen annotation application designed for drawing directly over desktop content. It provides a transparent overlay for highlighting information during presentations, tutorials, and demonstrations. Users can draw with brushes, pens, highlighters, and geometric shapes without modifying underlying applications. The software includes text annotations, arrows, an eraser, and a laser pointer for temporary emphasis. A whiteboard mode provides an alternative surface for explaining ideas. Keyboard shortcuts allow quick switching between drawing tools and normal pointer interaction. Users can adjust drawing colors and line thickness while clearing annotations when needed. Built with Electron, DrawPen is available for Windows, macOS, and Linux.
    Downloads: 2 This Week
    Last Update:
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  • 22
    impress.js

    impress.js

    Presentation framework based on CSS3 transforms & transitions

    impress.js is an impressive presentation tool inspired by the idea behind prezi.com and based on the power of CSS3 transforms and transitions in modern browsers. It showcases some awesome CSS3 features to create amazing and engaging presentations from your browser. Visualize your ideas in a totally unique way-- with impress.js’ infinite canvas, the only limit is your imagination. impress.js offers many great features, presenting your ideas in visually engaging 3D, dynamic movements and varied text options and positioning. It works well on recent versions of Firefox and Chrome, and on IE too. impress.js can also be used to embed animations or presentations in a web page, however this may not be viewed correctly or at all by some page visitors. See the official impress.js demo at https://impress.js.org/
    4.0 out of 5 stars 1 Review
    Downloads: 2 This Week
    Last Update:
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  • 23
    reveal.js

    reveal.js

    The HTML Presentation Framework

    reveal.js is a framework for creating beautiful interactive presentations using HTML. It comes with a wide range of features, including nested slides, auto-sliding, touch navigation, Markdown support, PDF export, speaker notes, theming and more. It also comes with a JavaScript API that allows you to control various other options, and a list of plugins that can be used to extend reveal.js further. reveal.js currently offers full support for any recently released version of the following browsers: Chrome, Safari, Firefox, Opera, Edge and IE10-11. It has limited support for IE9 and Firefox 3.6. For a live demonstration, visit https://revealjs.com
    Downloads: 2 This Week
    Last Update:
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  • 24
    Ken Burns Slideshow

    Ken Burns Slideshow

    Instant, portable, fullscreen slideshow with Ken Burns effect and more

    Create instant & real-time full-screen slideshow with the Ken Burns effect (and more!) for a set of images. Added several additional transition animations. 支持简体中文! Refer to readme.md in Files for a full description. Video preview: https://youtu.be/ch2UjN9nwIc Video preview (for China): http://v.youku.com/v_show/id_XMTQ5NTM0NTAxMg==.html For detailed description, change log and the latest dev build: https://github.com/changbowen/Ken-Burns-Slideshow
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    5.0 out of 5 stars 3 Reviews
    Downloads: 15 This Week
    Last Update:
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  • 25
    GeSHi - Generic Syntax Highlighter for PHP. Used to highlight almost any code for the web. Nearly 150 supported languages: PHP, HTML, C and more. Styles can be changed on the fly and CSS classes can be used to reduce the amount of XHTML compliant output.
    5.0 out of 5 stars 9 Reviews
    Downloads: 10 This Week
    Last Update:
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