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.

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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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    Downloads: 5,752 This Week
    Last Update:
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  • 2
    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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    Downloads: 545 This Week
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  • 3
    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: 70 This Week
    Last Update:
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  • 4
    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.
    Downloads: 40 This Week
    Last Update:
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  • 5
    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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    Downloads: 121 This Week
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  • 6
    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.
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    Downloads: 526 This Week
    Last Update:
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  • 7
    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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    Downloads: 65 This Week
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  • 8
    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.
    Downloads: 58 This Week
    Last Update:
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  • 9
    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.
    Downloads: 39 This Week
    Last Update:
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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.
    Downloads: 49 This Week
    Last Update:
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  • 11
    LibVNCServer/LibVNCClient are cross-platform C libraries that allow you to easily implement VNC server or client functionality in your program.
    Downloads: 48 This Week
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  • 12
    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.
    Downloads: 28 This Week
    Last Update:
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  • 13
    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: 5 This Week
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  • 14
    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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    Downloads: 37 This Week
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  • 15
    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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    Downloads: 36 This Week
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  • 16
    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/
    Downloads: 3 This Week
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  • 17
    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.
    Downloads: 12 This Week
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  • 18
    A Python interface to the gnuplot plotting program.
    Downloads: 14 This Week
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  • 19
    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.
    Downloads: 11 This Week
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  • 20
    PDF Clown

    PDF Clown

    General-Purpose PDF Library for Java and .NET

    PDF Clown is a general-purpose Java and .NET library for manipulating PDF files through multiple abstraction layers, rigorously adhering to PDF 1.7 specification (ISO 32000-1). This project aims to provide a universal access to PDF files (creation, reading, editing, rendering...) through an accurate and elegant object-oriented API. * Features: http://pdfclown.org/overview/features/ * Overview: http://pdfclown.org/overview/architecture/ * Website: http://pdfclown.org/ * Blog: http://www.pdfclown.org/blog/ * Twitter: https://twitter.com/PDFClown
    Downloads: 12 This Week
    Last Update:
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  • 21
    MPAndroidChart

    MPAndroidChart

    A powerful Android chart view / graph view library

    MPAndroidChart is a powerful chart library for Android that offers a beautiful and comprehensive range of charts and graphs. Powerful and very easy to use, it supports the creation of bar-, line-, pie-, bubble-, scatter-, radar- and candlestick charts, as well as scaling, dragging and animations. Charts are rendered cleanly and are visually engaging. Visualizing your data exactly how you want is so much easier with MPAndroidChart. To see more great examples of MPAndroidChart, download the MPAndroidChart Example App on Google Play.
    Downloads: 2 This Week
    Last Update:
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  • 22
    OpenChords

    OpenChords

    A digital songbook for guitarists and other musicians

    OpenChords is an alternative to traditionally printed chord songbooks. If you hate filing music away after a practice or gig... this is for you. If you struggle to find your songs because you cannot remember the name of the song... this is also for you. If you wished you could just change the key of the song in the middle of a live performance... you have come to the right place. If you find any bugs or have some suggestions, feel free to email me at open.chords.app@gmail.com. If you would like the source code it has moved to github. you can access it on https://github.com/wolfyreload/OpenChords Please note that this application requires Microsoft .Net framework 4.8.1.
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    Downloads: 12 This Week
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  • 23
    pgfplots - A TeX package to draw normal and/or logarithmic plots directly in TeX in two and three dimensions with a user-friendly interface and pgfplotstable - a TeX package to round and format numerical tables. Examples in manuals and/or on web site. ATTENTION: As of February 2020, the development has been moved to https://github.com/pgf-tikz/pgfplots ! Please refer to the new page for downloads and change requests! This page is kept in read-only mode.
    Downloads: 9 This Week
    Last Update:
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  • 24
    JIBS - Image Viewer for Sorting

    JIBS - Image Viewer for Sorting

    Image viewer used for sorting and other utilities

    JIBS: Java Image Browser Sorter. An image viewer with a full-screen slide show, image sorting, and producing contact sheet/thumbnails. The image viewer is perfect for sorting digital photos into correct directories. Displays EXIF information captured in the photos. Also great for managing downloaded images. Lots of other utilities included.
    Downloads: 9 This Week
    Last Update:
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  • 25
    Flow Teleprompter

    Flow Teleprompter

    A Windows first teleprompter with voice tracking and AI drafting.

    Flow is an ultra-lightweight, high-performance desktop teleprompter built with Tauri and Rust. It is designed for creators & presenters who need a clean reading surface without sacrificing advanced features like native voice tracking via local Vosk models and app-wide voice commands. It features five playback styles (highlight, scroll, line, arrow, and voice tracking), local-first privacy, and a built-in script editor. Version 1.9.0 introduces WebRTC-powered real-time collaborative editing, allowing an unlimited number of guests to join and edit scripts live across devices. It also includes an invisible always-on-top overlay for Screenshare bypass, remote script delivery via quick-connect QR links, and optional Groq-powered AI drafting. Flow keeps RAM usage minimal while maintaining top-tier performance and staying completely out of your way.
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    Downloads: 37 This Week
    Last Update:
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