Dia diagram editor Alternatives (September 2025)

Inkscape is professional quality vector graphics software which runs on Linux, Mac OS X and Windows desktop computers.

Free interior design software. Draw the plan of your home or office, test furniture layouts and visit the results in 3D.

Chemical drawing and publishing software for Windows, macOS and Linux. Affordable and used by thousands of scientists around the world. Free trial available for immediate download.

An easy, intuitive tool to make 2D hand-drawn animations.

MyDraw is an advanced diagramming software for drawing flowcharts, org charts, mind maps, network diagrams, floor plans, and business diagrams.

FileZilla - The free FTP solution for both client and server. Filezilla is open source software distributed free of charge.

OpenFOAM is the leading free, open source software for computational fluid dynamics (CFD), owned by the OpenFOAM Foundation and distributed exclusively open source under the General Public...

Krita is a professional FREE and open source painting program. It is made by artists that want to see affordable art tools for everyone.

OpenShot is an award-winning free and open-source video editor for Linux, Mac, and Windows. Create videos with exciting video effects, titles, audio tracks, and animations.

Sylpheed - Sylpheed はシンプル、軽量かつ高機能で使いやすい、無料のメールソフトです。Sylpheed は Windows から Linux まで様々なプラットフォームに対応しています。

FreeCAD, the open source 3D parametric modeler

MantisBT is a popular free web-based bug tracking system. It is written in PHP works with MySQL, MS SQL, and PostgreSQL databases. MantisBT has been installed on Windows, Linux, Mac OS, OS/2, and others. It is released under the terms of the GNU General Public License (GPL).

pgAdmin - PostgreSQL Tools for Windows, Mac, Linux and the Web

Lunacy by Icons8 is free graphic design software for Windows, macOS, Linux. Open, edit sketch files with ease. Built-in vector, photos, UI kits, and more.

Download graphics software free to create, paint, draw & edit banners, logos, vector images & more. Award winning illustration drawing software. Free download for PC & Mac.

ConceptDraw DIAGRAM key features.

OmegaT is a free open-source translation memory application for professional translators written in Java.

Greenshot allows you to make and to edit screenshots simply. The application allows to ‘capture’ window, a portion of the screen or the entire screen.

Free desktop project scheduling and management app with Gantt chart for Windows, Linux and macOS

Bazaar version control system: easily manage source code on Windows, Ubuntu, GNU/Linux, and Mac OS X

Excalidraw is a free virtual collaborative whiteboard for creating simple hand-drawn style diagrams, illustrations, flowcharts.. No sign-up. Just draw

Software to create fast, simple sketches to visualize your ideas, venn diagrams, flowcharts, process maps, plans, charts and UI mockups

The Microsoft Build of OpenJDK is a new no-cost long-term supported distribution and Microsoft’s new way to collaborate and contribute to the Java ecosystem.

GNU Octave is a programming language for scientific computing.

A free and open source software to merge, split, rotate and extract pages from PDF files. For Windows, Linux and Mac

Open source EDA / electronics CAD software for Windows, macOS and Linux. Use schematic capture, create PCB designs and view them in 3D, all forever free.

GnuPG is a free implementation of OpenPGP

The free, multiplatform, feature-rich screenwriting program!

SketchBook is sketching, painting, and illustration software for all platforms and devices. With professional-grade drawing tools in a beautiful interface, Sketchbook is easy to use for anyone who wants to explore and express their ideas.

Home of the Bluefish Editor, a powerful editor targeted towards programmers and webdesigners. It supports working with local and remote files, syntax highlighting and a WYSIWYN interface.

Start your free trial of Canvas X Draw. An easy to use standalone design and illustration software! Vector graphics drawing software by Canvas GFX.

Draft It Free is the best free CAD software with 2D design drawing tools. Download our free CAD software to create and print drawings easily.

Download free WPS Office Presentation to make professional & beautiful Powerpoint Slides. Best Free Alternative to Microsoft Powerpoint for PC, Windows, Mac, Linux, Android, and iOS devices.

VeraCrypt is free open-source disk encryption software for Windows, Mac OS X and Linux. In case an attacker forces you to reveal the password, VeraCrypt provides plausible deniability. In contrast to file encryption, data encryption performed by VeraCrypt is real-time (on-the-fly), automatic, transparent, needs very little memory, and does not involve temporary unencrypted files.

Download the free Autodesk Design Review DWF viewer, the all-digital way to view, mark up, measure, print, and track changes to 2D and 3D design files.

Create 210+ types of diagrams with EdrawMax, a simple diagram maker powered by AI. Try free diagram and chart templates. Explore what AI can help in diagramming.

Sketchpad is available online and for download on PC and Mac. Whether you're working on a school poster or brainstorming your next comic book character, Sketchpad makes it easy to bring your ideas to life. Easily draw, edit photos, or design your next business card. Craft images for social media posts, digital ads, paper, or even apparel

Looking for free screen recording software to work and study from home? Check out Movavi Screen Recorder for PC. Capture your screen with audio.

VLC: Official site - Free multimedia solutions for all OS!

A Git GUI that offers a visual representation of your repositories. Sourcetree is a free Git client for Windows and Mac.

The Worlds leading desktop marker software. Epic Pen allows you to draw over any software on Windows and Mac OS. Epic Pen allows you to draw over any application on Windows and Mac. Epic Pen never interrupts your work, allowing you to continue using your applications seamlessly even with drawings on the screen. Epic Pen works great with popular apps like Zoom, Microsoft Teams, Google Hangouts and Hopin.

VueScan is the easiest way to get your scanner working on macOS, Windows and more. VueScan includes a driver for your scanner even though it isn't support anymore.

EditPad Lite: A fine text editor with all the necessary basic features. Free for non-commercial use. An ideal replacement for Notepad.

ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to many supported destinations you can choose from.

Amazon Corretto is a no-cost, multiplatform, production-ready distribution of the Open Java Development Kit (OpenJDK). Corretto comes with no-cost long-term support. Amazon runs Corretto internally on thousands of production services and Corretto is certified as compatible with the Java SE standard.

FreeRTOS is an open source, real-time operating system for microcontrollers and microprocessors that makes small, low-power devices easier to program, deploy, and secure.

libGDX is a cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, macOS, Android, your browser and iOS.

This is a free online DWG/DXF viewer & editor, easy & fast to view and edit CAD drawings. DWG FastView is the comprehensive software to view & edit Autocad drawings in PC, mobile & web browsers.

Gliffy's drag-and-drop diagramming software makes it easy to express any idea visually. Get started in Confluence, Jira, or Gliffy Online.

Markup Hero is a powerful, free application to take & share screenshots as well as annotate images, PDFs & websites. Made for Mac, Windows, Linux & your web browser.

Open source Python framework for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps.

Website for Spyder, the Scientific Python Development Environment

File Viewer Lite is a free file viewer for Windows that allows you to open and view over 150 different file types.

WPS Office is a free and all-in-one Office suite, highly compatible with MS Office Word, Excel, and PPT. Can be downloaded online and free trial for Windows, Mac, iOS, Android and Linux.

Visual Studio Code is a code editor redefined and optimized for building and debugging modern web and cloud applications.  Visual Studio Code is free and available on your favorite platform - Linux, macOS, and Windows.

WampServer est une plate-forme de développement Web sous Windows permettant de développer des applications Web dynamiques avec Apache2, PHP et de MySQL.

Autodesk DWG TrueView allows you to open and view 2D and 3D DWG files for free, or convert them to work with older versions of AutoCAD software.

A powerful graphical user interface application, for interacting with git version control.

Millions of devs and teams choose GitKraken Desktop to make Git more visual, accessible and collaborative. Download to use for free and to start a team trial.

Professional-grade 2D CAD software that can be used to create, edit, view, and markup any kind of 2D drawing or DWG file.

Ninja-IDE is an open-source Python IDE. You will find guides on Windows, Cyber Security and Linux along with downloads for software and Apk.

Simplify and communicate complex information using data-linked diagrams.

.NET is a free, cross-platform, open-source developer platform. .NET has languages, editors, and libraries to build for web, mobile, desktop, games, and IoT.

Download free WPS Office Spreadsheet to create and edit professional Excel sheets. Best Free Alternative to Microsoft Excel for PC, Windows, Mac, Linux, Android, and iOS devices.

Professional video editing, color correction, visual effects and audio post production all in a single application. Free and paid versions for Mac, Windows and Linux.

Sketch is the all-in-one platform for digital design — with collaborative design tools, prototyping and developer handoff. Get started for free.

Easy Blue Print is a software program used to quickly create floor plans for office and home layouts with precise measurements.

SapMachine : The OpenJDK release maintained and supported by SAP

The Freedom to Create

Tabby is a free and open source SSH, local and Telnet terminal with everything you'll ever need.

The best app for creatives and other professionals looking to create high-quality designs, concept art, illustrations, mock-ups and more. Get a free trial!

Express Scribe works with a foot pedal or hot keys to make work easy for a transcriptionist on Windows and Mac. Utilize variable speed playback, multi-channel control and more.

Free office suite – the evolution of OpenOffice. Compatible with Microsoft .doc, .docx, .xls, .xlsx, .ppt, .pptx. Updated regularly, community powered.

nanoCAD - professional, cost-effective CAD Software with powerful 2D/3D modeling tools for viewing and drawing DWG files in engineering and architecture. Free download.

Visual communication software that helps people make professional-looking content quickly.

Charles Web Debugging Proxy - Official Site

Create diagrams online with a collaborative online diagramming tool. Join the 390,000 users drawing diagrams, flowcharts, and wireframes online with Cacoo.

Mailspring: The open-source, extensible email app for Mac, Linux, and Windows with open tracking, link click tracking, contacts enrichment data and more.

Open, Measure and Convert CATIA, Siemens NX, Creo, SolidWorks, SolidEdge, Inventor, Rhino, JT, STEP, IGS, VDA, X_T, SAT [Free Trial Now]

Create stunning online photo albums with jAlbum. Discover the most powerful web album making tool there is!

Animation Desk is a free animation app available on iPad, iPhone, Android, Mac, and Windows.

Open-source electronic prototyping platform enabling users to create interactive electronic objects.

Looking for free graphic design software? Easily create professional designs with VistaCreate, a free design tool with powerful features and 100K+ ready-made templates

FreeShow is a free and open-source presenter software for anyone to use with ease.

AWStats Official Web Site - Compile and generate advanced graphical web, ftp or mail statistics with a logfile analysis (For IIS, Apache,... distributed under GNU GPL).

Advanced Installer is a Windows installer authoring tool for installing, updating, and configuring your products safely, securely, and reliably.

Fast, reliable & accurate scanning software for Windows: free, home or pro versions. Includes scanning 100+ file types, OCR, image correction, printing & more.

OpenCV provides a real-time optimized Computer Vision library, tools, and hardware. It also supports model execution for Machine Learning (ML) and Artificial Intelligence (AI).

Audacity is the world's most popular audio editing and recording app. Edit, mix, and enhance your audio tracks with the power of Audacity. Download now!

3DCoat is the application that has all the tools you need to take your 3D idea from a block of digital clay all the way to a production-ready, fully textured organic or hard surface model. It combines different technologies: voxels and polygons - for 3D model creation. Today 3DCoat is available to learn at 300+ Universities, Colleges, and Schools worldwide.

OSSEC is a multiplatform, open source and free Host Intrusion Detection System (HIDS). You can tailor OSSEC for your security needs through its extensive configuration options, adding custom alert rules and writing scripts.

All-in-one software design tool for creating prototypes, specifications, and diagrams

Create & edit beautiful charts & slides in minutes with the #1 PowerPoint charting software. think-cell supports over 40 chart types & 1,000,000 users.

The Jupyter Notebook is a web-based interactive computing platform. The notebook combines live code, equations, narrative text, visualizations, interactive dashboards and other media.

DesignWizard is a Free Graphic Design Software helping you to create Free graphic designs online in seconds!

UML design and business analysis tool for modeling, documenting, reverse engineering, building and maintaining object-oriented software systems, fast and intuitive. Great features, great price.

UML design and business analysis tool for modeling, documenting, reverse engineering, building and maintaining object-oriented software systems, fast and intuitive. Great features, great price.

Creo Elements/Direct is a comprehensive system for mechanical engineers and designers who create products using the ‘direct modeling’ approach to 3D CAD.

GitBreeze is the AI Git client for Windows, Mac, & Linux. It boosts your software development with code analysis and suggestions in a fully featured Git GUI.