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30,062 projects in the catalog.

Free Pascal, Lazarus and Delphi components, libraries and programs from GitHub, SourceForge, Codeberg, GitLab and more. Rate them, mark what looks interesting, and talk about them on their benches.

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fpGTK3

GTK3 Library for Free Pascal

  • Active
  • Library
  • Lazarus
  • GitHub
  • ★ 2
  • GPL-3.0

Bindings

LazHIDControl

Cross platform keyboard and mouse input control and window automation in Pascal.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 3

System

5.0 from 1 member

vclua

Gui library for lua

  • Active
  • Library
  • Lazarus
  • GitHub
  • ★ 11
  • MIT

Bindings

OAuth2Client

An RFC 6749 OAuth2 Client implemented as a Lazarus Package. The client is intended to be fully featured and supports the following grant types: Authorization Code Grant Implicit Grant Resource Owner Password Credentials Grant Client Credentials Grant. Attention has also been paid to extensibility. The client also provides: A means of implementing an Extension Grant, including new grant types. Support for new token types Support for New Endpoint Parameters, and Support for additional error codes. This OAuth2 Client uses an external User Agent - the System Web Browser - and incorporates in internal http server for handling redirect responses from an Authorization Server. The package uses the Indy Component library for both an http/https client and an http server. When the https protocol is used the OpenSSL library must also be installed and available for use. Multithreading support is required for Authorization Code and Implicit Grants. The package is written in Object Pascal and is made available under the Lesser GPL. The package requires the Indy package for http/https protocol support. It has been configured for use with the MWA Software IndySecOpenSSL package and the Indy Component Library. A separate branch (Indy106Compat) is also available. This will work with the Indy Component library on its own. However, you will be limited to using the unsupported OpenSSL 1.0.2 library (current is OpenSSL 3.x) and TLS 1.2. For installation instructions please refer to the User Guide.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 30
  • This file is part of this MWA Software OAuth2 Client

Networking Security In the Online Package Manager

Veridian

Veridian is an GUI library for MS-DOS written in Turbo Pascal 7 using the Alaveri Pascal Library (APL). It supports VGA/SVGA 256, proportional fonts, windows, menus, buttons and other GUI controls (early version under development).

  • Active
  • Library
  • GitHub
  • ★ 18
  • MIT

GUI containers

liblcl

A common cross-platform GUI library, the core uses Lazarus LCL.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 165

Bindings

Delphi-Crash-Reporter

Cross-platform Delphi crash/exception reporter (Linux, macOS, Android, iOS) that emits EurekaLog .el-format reports (open in the EurekaLog Viewer): call stacks, CPU registers, modules, source line numbers. RTL-only core, no FMX dependency, no EurekaLog license required.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 9
  • BSD-2-Clause

System

2.0 from 1 member

TRURL

TRURL is a suite of desktop calculators with reverse Polish notation (RPN) written in Object Pascal. Additionally, it comes with a free reusable class library (RPN Engine) as a toolbox for creating your own calculator. TRURL is an acronym for "TRURL is a Reusable Universal RPN Library". Class Libraries: • RPN Engine: Full-featured calculation engine for Pascal-based RPN calculators • Segmitator: Library for virtual seven-segment displays Applications: • TRURL A: Simple demo app for the RPN Engine • TRURL B: RPN calculator in the design of the famous calculators by Dieter Rahms for Braun • TRURL G: Desktop RPN calculator inspired by the UI of the DSKY unit of the Apollo Guidance Computer (AGC)

  • Active
  • Application
  • SourceForge
  • BSD License

Science

trurl

TRURL is a suite of desktop calculators with reverse Polish notation (RPN) written in Object Pascal. Additionally, it comes with a free reusable class library (RPN Engine) as a toolbox for creating your own calculator. TRURL is an acronym for "TRURL is a Reusable Universal RPN Library". Class Libraries: • RPN Engine: Full-featured calculation engine for Pascal-based RPN calculators • Segmitator: Library for virtual seven-segment displays Applications: • TRURL A: Simple demo app for the RPN Engine • TRURL G: Desktop RPN calculator inspired by the UI of the DSKY unit of the Apollo Guidance Computer (AGC)

  • Active
  • Application
  • Lazarus
  • Codeberg
  • ★ 3

Science

MSEide+MSEgui

MSEide is a Rapid Application Development IDE for platform independent rich GUI applications in the Pascal language. It comes with its own GUI toolkit called MSEgui, which ensures programs are portable. MSEgui has identical look and feel on all supported platforms, the look of the widgets is highly configurable. The widgetset library is completely written in Pascal and links directly to xlib on Linux and FreeBSD and to gdi32 on win32/64. MSEgui includes sophisticated DB-access components and DB-aware widgets. Main goal of development is to provide a handy, stable and very productive tool for professionals. MSEide+MSEgui currently runs on i386-linux, i386-win32, x84_64-win64, x84_64-linux, x86_64-freebsd and arm-linux. Main git repository: https://gitlab.com/mseide-msegui/mseide-msegui

  • Quiet
  • Application
  • Lazarus
  • SourceForge
  • GNU Library or Lesser General Public License version 2.0 (LG

Language Tools

SnapModbus

SnapModbus is an Open-Source multi-platform suite (library and tools) to manage Modbus communication in strict adherence to the modbus.org specifications, both master and slave side. It supports all the functions described in the documents: * MODBUS APPLICATION PROTOCOL SPECIFICATION V1.1b3 * MODBUS MESSAGING ON TCP/IP IMPLEMENTATION GUIDE V1.0b * MODBUS over Serial Line - Specification and Implementation Guide V1.02 through the standard transport protocols and the most widespread unofficial protocols (UDP, RTU Over TCP, RTU Over UDP) It’s released under lglp v3, so it’s free also for commercial use.

  • Quiet
  • Library
  • SourceForge
  • GNU Library or Lesser General Public License version 3.0 (LG

Networking

KOL-CE

KOL-CE - Key Objects Library CE is a set of objects to develop powerful (but compact) Windows CE/Pocket PC/Windows Mobile/Win32 GUI applications using Free Pascal. The library is based on KOL library by Vladimir Kladov (http://kolmck.net).

  • Quiet
  • Library
  • Lazarus
  • SourceForge
  • wxWindows Library Licence

Other

Free Pascal Programmer Library

The Free Pascal Programmer Library is a comprehensive collection of components for use with the free pascal compiler, making use fpc 2.2's new generics capabilities. Includes collections, iterators, XML parsers, and a GUI library.

  • Library
  • Lazarus
  • SourceForge
  • GNU Library or Lesser General Public License version 2.0 (LG

Other

Windows Ribbon Framework for Delphi

. Delphi This Delphi library allows Delphi developers to use of the Windows Ribbon Framework in their Delphi applications. This library uses the native Windows library to implement the Ribbon functionality. It does not emulate the Ribbon user interface like other Delphi component sets do or Delphi's built-in Ribbon emulation components.

  • Library
  • Delphi
  • GitHub

GUI containers

XCL - XDE's Component Library

XCL is XDE's Component Library, a GTK+ Based Object Pascal Component Library for GUI Development with FreePascal

  • Library
  • Lazarus
  • SourceForge

Other

SII_Decrypt

[DISCONTINUED] Small library/tool designed to decrypt SII files used as saves in truck games by SCS Software. Can be used as DLL, console program, GUI program or directly in a code.

  • Quiet
  • Application
  • Lazarus and Delphi
  • GitHub
  • ★ 81
  • MPL-2.0

Games and Game Engines

binpacking2d

This is a simple, yet powerful Delphi library aimed to help people resolve binpacking 2D problems. It contains a engine capable of accommodate planes inside a main plane in order to allow edge to edge (guillotine) cut while minimizing the waste of raw materials (paper, wood, glass).

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 4
  • MPL-2.0

Science

Delphi : VRCalc++ OOSL (Script) and more

Vincent Radio {Adrix.NT} Sources Library & Applications : Delphi C++ Java VRCalc++ C# VRCalc++ Object Oriented Scripting Language - Engine Source Pascal Code - Delphi Packages Build Prjs - VRCalc++ Scripted System Std RT Library - Guides & Docs (CHM, PDF, DOCX) - VCL & FMX (FireMonkey) Support - Script Test Code (Lang RTL VCL FMX) - Visual Stage Project : VCL & FMX Paged Lists & Iterators : Delphi C++ Java C# Multi-Dim Arrays & Direct Graph Classes : Delphi C++ Java VRCalc++ C# Delphi Drag&Drop Applications - VRCalc++ Script Executors: Terminal, VCL, FMX - VRMultiEdit - VRLazyCodeEditor - VR Astro Vision (Astrology) - Paged List Test - VRMosaic : Delphi C++Builder Java C# +with auto resolver - VR Free Chess 2D - VRBlocks - VRGraphStage - VR TTT OX + icons & bitmaps + VCL VisualStyles + Build Projects + instructions to build projects to build projects - Delphi : RAD Studio - C++ : Dev-C++ - java : NetBeans - C# : MS/VS adrixnt@hotmail.it

  • Active
  • Other
  • Delphi
  • SourceForge
  • Affero GNU Public License, GNU General Public License versio

Language Tools

The EOS library

EOS is a library that allows automated XML marshalling/demarshalling of Pascal Business Objects and complex object structures and it's easy linking to the GUI through the ModelBridge framework. You can use it with Delphi, Kylix and Free Pascal.

  • Quiet
  • Library
  • Delphi
  • SourceForge
  • GNU Library or Lesser General Public License version 2.0 (LG

Other

Free Pascal Gfx Library

The Free Pascal GFX Library is a framework to quickly develop cross-platform GUI software. It is light weight, and connects directly to the underlying system, allowing for the creation of small and fast graphical applications.

  • Library
  • Lazarus
  • SourceForge
  • GNU Library or Lesser General Public License version 2.0 (LG

Other

fpwebview

Free Pascal binding for Webview, a tiny cross-platform library for building modern cross-platform GUIs using web technology

  • Quiet
  • Library
  • Lazarus
  • GitHub
  • ★ 58
  • MIT

Bindings

TWLazUI

"A modern, Tailwind CSS-inspired UI component library for Lazarus and Free Pascal, powered by BGRABitmap." (Pustaka komponen UI modern bergaya Tailwind CSS untuk Lazarus dan Free Pascal, ditenagai oleh BGRABitmap.)

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 29
  • MIT

GUI containers

KOL

KOL - Key Objects Library is a set of objects to develop power (but small) 32 bit Windows GUI applications using Delphi but without VCL (or Free Pascal). It is distributed free of charge, with source code.

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 18

Other

nc-paslib

A (non-GUI) base utilities library for Pascal (Delphi/Free Pascal/Lazarus)

  • Quiet
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 9
  • LGPL-2.1

System

NimbusFormsVCL

PREVIEW! Experimental Delphi 12 VCL component library with themed controls, editors, charts, grids, and demos. Developer Edition · MIT licensed.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 3
  • MIT

GUI containers

ServerSnap7Enhanced

Emulate Siemens PLC Data Blocks (DB) as server. You can access to it with S7 connection (Snap7 Client library or a real Siemens PLC). On the server GUI it is possible to read/write single variables of a selected DB. Based on Snap7 and mORMot libraries.

  • Quiet
  • Application
  • Lazarus
  • GitHub
  • ★ 3
  • GPL-3.0

Networking

objectgem

Retro ObjectGEM application library for Pure Pascal on TOS systems

  • Quiet
  • Library
  • GitHub
  • ★ 2
  • MIT

GUI containers

SGL-Pascal

Small GUI Library binding for Pascal

  • Archived
  • Library
  • GitHub
  • ★ 2
  • MIT

Bindings

Huh

Huh? a simple MUI-GUI for identify.library

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 1
  • CC0-1.0

Other

PascalChordSVG

A CLI and a library to create SVG files of guitar chords.

  • Active
  • Library
  • GitHub
  • ★ 1

Graphics

PAS2PHP

PAS2PHP will translate a large subset of Object Pascal to PHP, allowing you to write web applications using Lazarus/FreePascal, and then run the application on a standard HTML/PHP server. Over the last week, a lot of work has gone into PAS2PHP. Most of the major issues are resolved. There are still a number of incompatibilities which are either not fixable, or have simple workarounds. As of v0.5, you should be able to write entire PHP applications in Pascal. The key to coding for PAS2PHP is to understand the limitations of PHP. Read the example code provided, and always check the outputed PHP code to understand how this works. As a guide to what PAS2PHP can achieve... my web site is written in Pascal, and then converted to PHP. (The code is in the source package). PAS2PHP uses the Pascal Parse Tree Classes (PasTree) which comes with FreePascal, and therefore the parsing limits are defined by this library.

  • Quiet
  • Application
  • Lazarus
  • SourceForge
  • GNU Library or Lesser General Public License version 3.0 (LG

Language Tools

SQLite Micro Manager

SQLite Micro Manager is a lightweight, fast and configurable GUI program mostly designed to access, browse and modify data in SQLite3 databases maintained by other applications, like Web browsers, home accounting software etc. It supports drag-and-drop operations, saving to and retrieving SQL statements from internal library and disk files. runs natively on 64 bit Windows 7/8/10 and Linux Ubuntu derivatives with GTK2+. Can be easily compiled for OSX and Linux GTK3 and QT widget sets with minimal changes. It can run without any installation, although proper installation packages are provided for Windows and Ubuntu-based Linux distributions. The intended audience is people with at least basic knowledge of SQL who need fast and simple tool to deal with SQLite3 databases.

  • Quiet
  • Application
  • SourceForge

Database

opcb-object-pascal-component-builder

OPCB – Object Pascal Component Builder A library for fluent creation and configuration of components in Delphi and Lazarus. Enables expressive, hierarchical, and reusable runtime UI construction. Developed by Fabiano Arndt. Copyright © 2025 Fabiano Arndt

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 33
  • Apache-2.0

GUI containers

KOL

Key Objects Library, v2.00 with custom patch (not locking files by default)

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 29

GUI containers

soulengine

Windows GUI library for php (by Develstudio project)

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 25

Other

TInstructor

Delphi FMX component for a better way for new feature introduction and step-by-step users guide in your program.

  • Archived
  • Library
  • Delphi
  • GitHub
  • ★ 22
  • MIT

Other

fpGUIlib

Universal GUI library by fpGUI

  • Quiet
  • Library
  • Lazarus
  • GitHub
  • ★ 10
  • LGPL-2.1

Other

BibliotecaGD--FMX

A versatile collection of Delphi custom components for enhancing UI development and facilitating VCL to FMX migration, featuring advanced styling and database connectivity.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 8

GUI containers

CyberUI-Component

A cyberpunk-themed visual component library for Lazarus and Free Pascal. Features 18 math-rendered tactical controls for sci-fi dashboards and simulations.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 7
  • MIT

GUI containers

LsfWin

A graphical UI library written in Turbo Pascal 5.5.

  • Archived
  • Library
  • GitHub
  • ★ 6
  • MIT

GUI containers

dsocat

Interface program for a cheap DSO112 oscilloscope

  • Quiet
  • Application
  • Lazarus
  • GitHub
  • ★ 1
  • GPL-2.0

Science

galary_html

Small, but very customiziable app, for building html code of photogallaries

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 1
  • MIT

Applications

fpctwit

fpctwit is an OAuthv1, Twitter and Plurk library with example programs (console and GUI).

  • Library
  • Lazarus

Networking

Pascal GUI Framework

Native Object Pascal Framework for Graphical User Interface creation. Does not depends on any external library. Successor of the LPTK project.

  • Library
  • SourceForge
  • BSD License

Other

QUICK Lib

QUICK, which stands for Quick User Interface Construction Kit, is a Delphi library which aims at accelerating the development of graphical user interfaces as well as giving developers the possibility to create beautiful GUI's for their software.

  • Quiet
  • Library
  • Delphi
  • SourceForge
  • MIT License

GUI containers

awesome-pascal

A curated list of awesome Delphi/FreePascal/(any)Pascal frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff. Open source and freeware only!

  • Active
  • Other
  • Lazarus and Delphi
  • GitHub
  • ★ 2,096
  • CC0-1.0

Learning and Examples

horse

Fast, opinionated, minimalist web framework for Delphi

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 1,383
  • MIT

Networking

Alcinoe

Alcinoe empowers developers to build fast, modern apps without the usual complexity or performance bottlenecks. It keeps the focus on innovation—not tool constraints—delivering top performance, deep customization, and great cross-platform UX while staying independent of GAFA ecosystems.

  • Active
  • Package
  • Delphi
  • GitHub
  • ★ 1,134
  • Apache-2.0

Other

BGRAControls

Set of LCL visual components. Analog controls, button, checkbox, toolbar, panel, ribbon, progressbar etc.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 226
  • Modified LGPL

Graphics In the Online Package Manager

hidmacros

  • Quiet
  • Application
  • Lazarus
  • GitHub
  • ★ 167

System

mseide-msegui

MSEide is a Rapid Application Development IDE for platform independent rich GUI applications in the Pascal language. It comes with its own GUI toolkit called MSEgui. Binaries: https://github.com/mse-org/mseide-msegui/releases

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 167
  • GPL-2.0

Language Tools

LazWebsockets

Websocket Server and Client Library written in Lazarus

  • Quiet
  • Package
  • Lazarus
  • GitHub
  • ★ 123
  • BSD-3-Clause

Networking

Delphi-OpenCV

Project Delphi-OpenCV. Translation of OpenCV library header files in Delphi

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 542

Bindings Graphics

delphi-jose-jwt

Delphi implementation of JOSE (JSON Object Signing and Encryption) and JWT (JSON Web Token)

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 521
  • MIT

Security Cryptography