Sign in Join

Live chat for Free Pascal, Lazarus, Delphi and every Pascal programmer.

Catalog

30,061 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.

Random project How the catalog works

lazpaint

🎨 Cross-platform image editor with raster and vector layers similar to Paint.Net written in Lazarus (Free Pascal)

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 556
  • GPL-3.0

Graphics

5.0 from 1 member

Geometry

Implementation of the common computational geometry problems. The problem as old as the language that they are implemented here :-)

  • Quiet
  • Library
  • GitHub
  • ★ 2
  • MIT

Science

CRC32-Slicing-x64-Asm-Pas

CRC32 Slicing-By-8 Assembler IA-32 & x86-64 / Pascal implementation. IA-32 or x86-64 assembler code has 1,20 CPU clock cycles (on Skylake) per byte of data.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 5

Cryptography

helper

Solution for convert currency rate history to graph and find all cycles (Delphi)

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 2

Science

6502-Snake

Classic Snake as a bootable ROM cartridge for the A.C. Wright 6502, with a high score that survives power cycles.

  • Active
  • Library
  • GitHub
  • ★ 1
  • MIT

Games and Game Engines

AstraLogica

AstraLogica: Orbital Command is a tactical retro-tech sci-fi simulation where you act as the Chief Operations Officer (COO) of an isolated space station. Your mission is simple yet brutal: Survive 14 Sol cycles against cosmic anomalies, power blackouts, reactor meltdowns, and mysterious deep space transmissions.

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 1
  • MIT

Science

Computer-graphics-course

This example application of the use of graphics and animations is made as a basic course to get started in graphics and video game programming for my classmates in the upper cycle

  • Quiet
  • Other
  • GitHub
  • ★ 1
  • GPL-3.0

Learning and Examples

QuickScreenTest

A simple fullscreen display test tool that cycles through solid colors and checkerboard patterns to help detect monitor imperfections and pixel issues.

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 1

Other

RSI

BTS Réseaux et Systèmes informatiques (CNEPD), les deux cycles

  • Quiet
  • Other
  • GitHub
  • ★ 1

Learning and Examples

SBW (Systems Biology Workbench)

The Systems Biology Workbench(SBW) is a framework for application intercommunications. It uses a broker-based, distributed, message-passing architecture, supports many languages including Java, C++, Perl & Python, and runs under Linux,OSX & Win32. It comes with a large number of modules, encompassing the whole modeling cycle: creating computational models, simulating and analyzing them, visualizing the information, in order to improve the models. All using community standards, such as SED-ML, SBML and MIRIAM.

  • Quiet
  • Library
  • SourceForge
  • BSD License

Science Networking

CMD Calculator

Command-line calculator with many features: - Syntax and error highlighting - Text representation of numbers (English, French, Czech) and Greek numerals - Modes for angles (Radians, Gradians, Cycles and Degrees) - Chart for single variable "x" etc.

  • Quiet
  • Application
  • SourceForge

Science

Corners for DOS

Corners Game for dosemu (dosbox with 100% cycles).

  • Active
  • Application
  • SourceForge
  • GNU General Public License version 3.0 (GPLv3)

Games and Game Engines

GeckoPort version2

GeckoPort is a Lazarus/Free Pascal version of Takanori Ito's Gecko SDK for Delphi, including the TGeckoBrowser component. Version 2 is based on automatically generated include-files from the idl files from the Gecko SDK. For this purpose the idltopas utility is used. This way it's earier to follow the fast Gecko-release cycle now gecko-developers do not maintain backwards compatibility anymore. You can find more information about the old version of GeckoPort here .

  • Library
  • Lazarus

Networking

CoreCycler

Script to test single core stability, e.g. for PBO & Curve Optimizer on AMD Ryzen or overclocking/undervolting on Intel processors

  • Other
  • Lazarus
  • GitHub

Other

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

QuickLib

Quick development library (AutoMapper, LinQ, IOC Dependency Injection, MemoryCache, Scheduled tasks, Json and Yml Config and Options pattern, Serializers, etc) with crossplatform support for Delphi/Firemonkey (Windows,Linux,OSX/IOS/Android) and freepascal (Windows/Linux).

  • Active
  • Package
  • Lazarus and Delphi
  • GitHub
  • ★ 714
  • Apache-2.0

Other

LGenerics

Generic algorithms and data structures for Lazarus/Free Pascal

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 139
  • Apache-2.0

Other

pasvulkan

Vulkan header generator, OOP-style API wrapper, framework and prospective Vulkan-based game engine for Object Pascal

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 230
  • Zlib

Bindings Graphics

BrookFreePascal

Framework for web applications. Actions for DB access, advanced routing features, wizard for Lazarus, support for i18n, compatibility with JSON structures, REST implementation, plugins for varied needs, extensible brokers.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 174

Networking In the Online Package Manager

Suspending-Techniques

Comparing, discussing, and bypassing various techniques for suspending and freezing processes on Windows.

  • Quiet
  • Other
  • Delphi
  • GitHub
  • ★ 139

System

nx-horizon

NX Horizon - Event Bus for Delphi

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 132
  • MIT

Other

EditInVsCodeDelphiPlugin

Adds a "Open in Visual Studio Code" item in the Delphi Tools menu (great if you have the Copilot extension for Visual Studio Code)

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 78
  • MIT

Lazarus IDE plugins

SkiaSimpleShaderViewer

A simple Skia Shader Language (SkSL) viewer written in Delphi with Skia4Delphi.

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 70
  • MIT

Graphics

S7-PLC_MySql_MariaDB

MySql and MariaDB communication FB for Siemens PLC S7-1200 and S7-1500

  • Active
  • Other
  • GitHub
  • ★ 62
  • MIT

System

Javascript4D

A native JavaScript (ECMAScript 5.1) parser and interpreter written in Delphi/Object Pascal. Execute JavaScript code directly from your Delphi applications.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 61
  • MIT

Language Tools

MinimalistMediaPlayerX

A powerful, feature-rich MPV-based minimal-interface media player for 64-bit Windows. Lots of keyboard-controlled functionality but with minimal screen clutter. Automatically adjusts the window to match the video dimensions, without a window caption/title bar, to give an immersive viewing experience whether in window mode or fullscreen mode.

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 57
  • GPL-3.0

Multimedia

at2

Adlib Tracker II is, dare we say, the most userfriendly tracker aimed for the OPL3 FM-chip, and is full of advanced features to simplify your task of making the most of your Adlib-tunes.

  • Quiet
  • Application
  • Lazarus
  • GitHub
  • ★ 48

Multimedia

delphi-visual-studio-code-debugger

A debugger for delphi in visual studio code, and also a MCP server to give claude/copilot/etc authonomous delphi debugging capabilities

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 48
  • MIT

Language Tools

GamePlay

Gameplay is a frontend for MS-DOS, Windows 3.1, Windows 98, ScummVM, Apple II, Atari 800, Atari ST, Amiga, Sega Saturn, Super Nintendo, Nintendo64 and DSP Emulator. It lets you play games easily and quickly — no complications, no configuration needed

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 46

Games and Game Engines

SafeThread4D

Fluent, cooperative, UI-safe background task runner for Delphi FMX, with cancellation, timeout, progress, lifecycle callbacks, and optional mobile UI liveness diagnostics.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 46
  • MIT

System

MoonCompiler

Delphi 12-compatible Pascal compiler for Win64 and Linux x86-64. Your Delphi code builds on Linux unchanged — and often runs faster. FPC/Unleashed fork with Unicode RTL and bundled memory manager.

  • Active
  • Application
  • Lazarus and Delphi
  • GitHub
  • ★ 45

Language Tools

Chart4D

Native Delphi charting library for VCL and FMX: clean newspaper-style defaults, PNG export, zero dependencies

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 43
  • MIT

Charts and Graphs

SnapTRAINER

A modular Virtual-PLC Trainer

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 41
  • GPL-3.0

System

STAX

Singe Threaded Asynchronous Exexcution (STAX) framework for implementing asynchronous event scheduling similar to javascript or python co-routines

  • Quiet
  • Package
  • Lazarus
  • GitHub
  • ★ 41
  • BSD-2-Clause

Other

delphi-leakcheck

Multi-platform leak checking library for Delphi

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 38
  • Apache-2.0

System

fbclone

A wonderful tool to take care of your Firebird databases

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 36

Database

class-helpers

Directory of Delphi VCL/RTL class helpers

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 35
  • MIT

Other

mos6502-delphi

A MOS 6502 CPU emulator written in Delphi (a very basic C64 + VIC20 emulator included)

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 35
  • MIT

System

nx-chronos

NX Chronos - Chronometer for Delphi

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 32
  • MIT

Date and Time

XSID

Tools for the playback of XSID files and conversion of SID files.

  • Quiet
  • Application
  • Lazarus
  • GitHub
  • ★ 30

Multimedia

AFFBWheelGUI

GUI for AFFBWheel

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 29
  • MIT

System