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Open Source Fluid UI Alternatives

The best open source alternative to Fluid UI is diagrams.net. If that doesn't suit you, our users have ranked more than 50 alternatives to Fluid UI and 11 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Fluid UI are Penpot, Wireflow, Apache OpenOffice Draw and mydraft.cc.

Fluid UI alternatives are mainly Prototyping Tools but may also be Wireframing Tools or UI Design Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Fluid UI.
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Fluid UI iconFluid UI
  16
  • Online
  • Software as a Service (SaaS)

Fluid UI is the fastest mobile app prototyping tool available. Design and test your low and high fidelity app mockups on a...

Learn more about Fluid UI

  1. diagrams.net icon

    diagrams.net

    • Mac
    • Windows
    • Linux
    • Online
    • Chrome OS
    • Notion
    • Self-Hosted
    • Microsoft SharePoint
    • Microsoft OneDrive
    • PortableApps.com
    • Google Drive
    • Google Drive - Docs
    • Microsoft Teams
    • Google Slides
    • Google Drive - Sheets
    122 alternatives to diagrams.net 

    diagrams.net (previously draw.io) is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams. No login or registration are required and features include the ability to save locally (including SVG), a range of stencils, .

     Suggest and vote on features
    Features
    1.  Works Offlinediagrams.net can be used without the need to connect to the internet.
    2.  Support for Layersdiagrams.net supports the organization of elements through a hierarchical order that can be manipulated/viewed independently.
    3.  Dark Modediagrams.net supports dark mode for comfortable usage in low light conditions.
    4.  Lightweightdiagrams.net consumes less device resources compared to similar apps.
    5.  Support for LaTeXdiagrams.net supports LaTeX for text and math equation formatting.
    Example AWS diagram using draw.io
    Screenshot
  2. Penpot icon

    Penpot

    • Online
    • Self-Hosted
    104 alternatives to Penpot 

    Penpot is the first Open Source design and prototyping platform meant for cross-domain teams. Non dependent on operating systems, Penpot is web based and works with open web standards (SVG). For all and empowered by the community.

     Suggest and vote on features
    Features
    1.  Real time collaborationMultiple users can work together in Penpot simultaneously.
    2.  Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
    Penpot artboard
    Prototyping interactions


  3. Wireflow icon

    Wireflow

    • Online
    • Self-Hosted
    114 alternatives to Wireflow 

    Wireflow is free, online, real-time collaborative, open source tool for creating beautiful user flow prototypes.

     Suggest and vote on features
    Features
    1.  Real time collaborationMultiple users can work together in Wireflow simultaneously.
    2.  Kanban BoardWireflow allows you to organize your workflow by moving cards with drag-and-drop functionality between multiple columns.
    Screenshot
  4. Apache OpenOffice Draw icon

    Apache OpenOffice Draw

    • Mac
    • Windows
    • Linux
    94 alternatives to Apache OpenOffice Draw 

    Draw, part of the Apache OpenOffice suite, is a graphics editor that gives you the tools to communicate with visuals and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for posters, graphs, charts, and more.

     Suggest and vote on features
    Features
    For technical drawings with integrated graduation function (not available in PowerPoint)
  5. mydraft.cc icon

    mydraft.cc

    • Linux
    • Online
    • Self-Hosted
    67 alternatives to mydraft.cc 

    Open source wireframing tool written in typescript, react and redux.

     Suggest and vote on features
    Features
    ui


  6. Quant-UX icon

    Quant-UX

    • Mac
    • Windows
    • Linux
    23 alternatives to Quant-UX 

    Quant-UX is an integrated Prototyping and Analytics software. It allows you to design, test and analyze interaction prototypes.

     Suggest and vote on features
    Features
    Screenshot
  7. Diagramo icon

    Diagramo

    • FreeOpen Source
    • Online
    74 alternatives to Diagramo 

    Diagramo is an online flowchart software

    • diagrams (create, edit and share)
    • organization charts (create, edit and share)
    • network diagrams (create, edit and share)
    • graphs (create, edit and share).
     Suggest and vote on features
    Features
    Screenshot
    Diagramo vs Fluid UI opinions
    pros, cons and recent comments
    Guest

    It's not a wireframing/mockup tool

    Negative comment ago
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    0
  8. ProcessMaker icon

    ProcessMaker

    • FreemiumOpen Source
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    123 alternatives to ProcessMaker 

    ProcessMaker is a cost effective and easy to use open source business process management (BPM) or workflow software application. Workflow software such as ProcessMaker can assist organizations of any size with designing, automating and deploying business processes or workflows...

    Screenshot
  9. Presentator.io icon

    Presentator.io

    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    14 alternatives to Presentator.io 

    Presentator is a free web application that allows you to present your designs in an easy, organized and interactive way.

     Suggest and vote on features
    Features
    1.  Real time collaborationMultiple users can work together in Presentator.io simultaneously.
    Screenshot
    Screenshot
  10. Napkee icon

    Napkee

    • FreeOpen Source
    • Mac
    • Windows
    28 alternatives to Napkee 

    Napkee makes your Balsamiq Mockups come alive. Import a BMML and export to web or flex code in a few clicks.

     Suggest and vote on features
    This app doesn't have any features at the moment.
    Discontinued

    The program seems to be no longer updated. Last version, 2.0 alpha 3, released on October 30, 2013, can be still downloaded from the official website.

    This is the main window when Napkee starts.
Showing 10 of 11 alternatives
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