Open Source User Interface (UI) Software

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

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • Context for your AI agents Icon
    Context for your AI agents

    Crawl websites, sync to vector databases, and power RAG applications. Pre-built integrations for LLM pipelines and AI assistants.

    Build data pipelines that feed your AI models and agents without managing infrastructure. Crawl any website, transform content, and push directly to your preferred vector store. Use 10,000+ tools for RAG applications, AI assistants, and real-time knowledge bases. Monitor site changes, trigger workflows on new data, and keep your AIs fed with fresh, structured information. Cloud-native, API-first, and free to start until you need to scale.
    Try for free
  • 1
    [incr Tcl] is the most widely used O-O system for Tcl. The name is a play on C++, and [incr Tcl] provides a similar object model, including multiple inheritence and public and private classes and variables. Repos now http://core.tcl.tk/itcl and itk
    Leader badge
    Downloads: 150 This Week
    Last Update:
    See Project
  • 2
    JDatePicker. JavaBean components(calendar panel, combobox, dialog). Support appearance customization with visual editors, external skins support. Single, period, miltiple or null selection. Also support visual property customization without IDE
    Leader badge
    Downloads: 76 This Week
    Last Update:
    See Project
  • 3
    Gambas
    A Graphical Developement Environment based on a Basic Interpreter with object extensions.
    Downloads: 14 This Week
    Last Update:
    See Project
  • 4
    The AJAX JSP Tag Library is a set of JSP tags that simplify the use of Asynchronous JavaScript and XML (AJAX) technology in JavaServer Pages. Development moved to Mercurial
    Downloads: 21 This Week
    Last Update:
    See Project
  • Run applications fast and securely in a fully managed environment Icon
    Run applications fast and securely in a fully managed environment

    Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of scalable infrastructure.

    Run frontend and backend services, batch jobs, deploy websites and applications, and queue processing workloads without the need to manage infrastructure.
    Try for free
  • 5
    This project has moved! Go to https://github.com/yenrab/qchybrid
    Downloads: 9 This Week
    Last Update:
    See Project
  • 6
    SCL Manipulation and Configuration Tools, is a set of libraries and applications that allows to create and modify XML files witch use Substation Configutation Language based on IEC61850 part 6 standart.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 7
    C++ Grid/Table control with rich set of features. Now implemented in pure WinAPI. Also useful for MFC projects (via CWnd wrapper).
    Downloads: 2 This Week
    Last Update:
    See Project
  • 8
    Delphi Drag&Drop Suite by Adrix.NT

    Delphi Drag&Drop Suite by Adrix.NT

    Delphi Drag & Drop Comp Suite v.5.2 rev. by Vincent Radio {Adrix.NT}

    The Delphi Drag and Drop Component Suite v5.2 released Drag & Drop Delphi Library (*) Sources & Build Projects included original designer: Anders Melander www: melander.dk Revised & Adapted by Vincent Radio {Adrix.NT} ________________________________________________________________________________ REVISION NOTES the original Library from Anders Melander was splitted into 2 separed packages - a Run Time Package: "VRAxDragDropRTLCompSuitePackage" - a Design Time Package: "VRAxDragDropCompSuiteDesignPkg" (Win32 only) this way you can also use it on your 64 bits (Win64) application and install the design time package (Win32) into Delphi IDE which is a 32 bits Applic !! have fun with Drag & Drop for more info please refer to ... MelanderBlog: melander.dk - The Drag and Drop Component Suite v5.2 released for any question about installation e-mail me at: adrixnt@hotmail.it PS: it seems not working in C++Builder !! Adrix.NT
    Downloads: 4 This Week
    Last Update:
    See Project
  • 9
    Agar

    Agar

    Cross Platform GUI Toolkit

    Agar provides a base GUI framework and a standard set of widgets from which graphical applications can be built which run natively under X11, Windows, MacOS, SDL and others. It takes advantage of texture and GPU acceleration wherever available. Agar can also attach to an existing framebuffer, SDL or OpenGL context and operate as a self-contained window-manager. It includes a standard library of general-purpose widgets, and is also designed to be extended externally. New widgets can be implemented as part of an application or library. Complex user interface elements can be realized often in few lines of code. Agar is also extensible at the low-level. The low-level API is documented such that modular drivers can be written which enable Agar applications to work seamlessly under many platforms graphics systems without any change at the application level.
    Downloads: 6 This Week
    Last Update:
    See Project
  • The Complete PDF SDK Icon
    The Complete PDF SDK

    Bring PDF viewing, annotating, editing, creation, and generation to any web, mobile, desktop or server framework or application.

    Bring accurate PDF viewing, annotating, editing, creation, and generation to any web, mobile, desktop or server framework or application. Own the full document and data lifecycle by deploying on your own infrastructure without worrying about third-party server dependencies.
    Learn More
  • 10
    AODL,a C# .net library for creating / editing documents in the OpenDocument Format ( ODF ). Requires no knowledge about the ODF XML schema itself. AODC, an OpenDocument Converter & Embed OpenOffice as .net Control
    Downloads: 2 This Week
    Last Update:
    See Project
  • 11
    Aswang is a lightweight and flexible C++ class framework meant to make windows GUI development easier and faster without the imposition of bloated libraries or any particular visual style.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 12
    ShutDown 4.1 [En Español]

    ShutDown 4.1 [En Español]

    Permite programar el apagado o suspensión de la pc, entre otros...

    ShutDown es un programa para Windows diseñado para programar una hora de apagado, hibernado o suspensión de su PC, también puede programar el cierre o la apertura de procesos / programas ShutDown is a program for windows designed to schedule a time to shutdown or hibernate your pc, you can also schedule the closure or/and opening of processes/programs
    Downloads: 1 This Week
    Last Update:
    See Project
  • 13
    ajaxtags 1.3 with some improvements and bugfixes
    Downloads: 1 This Week
    Last Update:
    See Project
  • 14
    This is a calendar control with multi-select. It provides a point and click interface for selecting holidays or special days. It previously extended on MonthCalendar, now it has a fixed size in all regions and all drawing is handled internally.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    A time schedule graphical component with a point and click interface. This is a custom drawn control written in C#. It provides an easy interface for laying out periods of time associated with a predefined color/state. The control respects local timeform
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    ACDK - Artefaktur Component Development Kit - is a platform independent C++-framework similar to Java or C#/.NET for generating distributed and scriptable components and applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Adventure PHP Framework (APF)
    The adventure php framework understands itself as a utility to implement object oriented and generic PHP web applications. It supports the developer to create programms in compliance with approved software design patterns.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Aegeus brings the Open Object Rexx (ooRexx) API to Delphi Pascal programmers. A Delphi program (GUI or Console) can invoke any ooRexx service provided by the API and ooRexx Programs can invoke Delphi functions and subcommands.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    An implementation of an object-oriented UI for Naked Objects framework, implementing using Apache Wicket.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    A web form control for ASP.NET developers. The control features two way data binding, automatic data type validation and includes client side logic and validation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    BeanShield is a powerful Java library, that makes it easy to directly use your complex entity model in your UI (Web based and Client) without the need to copy or clone data to be able to rollback changes when a user clicks "Cancel".
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Ever wondered, how to create a huge Java/swing application, without ignoring the MVC-Pattern? BlackVisi is the ultimative way to keep you code simple, stable and maintainable! It is state-oriented, uses state-of-the art techniques (Java5) and is flexible
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    BlitzMaxGtk is a module which adds Gtk+ and Scintilla compatibility to BlitzMax (currently only available for Linux)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Blue Bird (Web Browser)

    Blue Bird (Web Browser)

    Blue Bird is a web browser useful enough for surfing the web.

    Blue Bird is a web browser created by MacroWorks(MacroWorks is a group made up of Sean Francis Nierve Ballais, Simon Ballais and Siarah Jayne Cabaluna Ballais now called Tresmarck) led by Sean Francis Nierva Ballais. It has been made in less than 5 hours. Good news to users! The reason the awaited version of Blue Bird is not yet released because we are awaiting plugins. YOU the user can make too. Please refer to Tresmarck facebook page's post regarding about Blue Bird plugins at www.facebook.com/TreSmarck.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    The BlueDecode frame work is an Open Source Third Party Java Library used for developing more interactive and customized 2D graphical user interfaces in Java using a MVC and object oriented programming approach.
    Downloads: 0 This Week
    Last Update:
    See Project