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30,057 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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GocciaScript

A sandbox-first JavaScript engine for AI agents: host-set capabilities and limits, deterministic runs, TypeScript annotations, test262 on every pull request.

  • Active
  • Library
  • Lazarus
  • GitHub
  • ★ 20
  • MIT

Language Tools

Waskal

Waskal is a Pascal/Oberon-inspired language that compiles to wasm64 and packages code, assets, and runtime support into a single self-contained HTML file. It uses JavaScript to bridge WebAssembly with browser graphics, audio, and input, delivering portable, dependency-free apps and games with a simple double-click-and-run experience.

  • Archived
  • Application
  • Delphi
  • GitHub
  • ★ 7

Language Tools

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

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

sandcat

An open-source, pentest and developer-oriented web browser, using the power of Lua

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 554

Networking Security

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

WebUI4Delphi

WebUI4Delphi is a WebUI wrapper, which allows you to use any web browser as a GUI, with Delphi or Lazarus/FPC in the backend and HTML5 in the frontend.

  • Active
  • Package
  • Lazarus and Delphi
  • GitHub
  • ★ 163
  • MIT

Bindings

raster-master

Raster Master Sprite/Icon/Map/Animation/Sound editor for Windows 7/8/10/11 Multiple Import/Export formats. Use sprite sheets to import graphics. Create your own sprite sheets. Create modern web games or retro games

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 111
  • MIT

Graphics

MarkdownHelpViewer

MarkdownHelpViewer is an integrated help system based on files in Markdown format, for Delphi applications, plus a useful component to embed help inside the App.

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 94
  • Apache-2.0

Applications

pascal-webui

Use any web browser as GUI, with Pascal in the backend and HTML5 in the frontend.

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 84
  • MIT

Bindings

Markdown4D

Native Delphi Markdown library: CommonMark/GFM parser with public AST, incremental/streaming parsing, HTML renderer, markdown writer, and custom-drawn VCL & FMX viewer/editor components

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 72
  • MIT

Edit and Memos

PasClaw

Ultra-lightweight native AI agent framework written entirely in Object Pascal for Delphi and Free Pascal, designed for performance, portability, and extensibility.

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 67
  • MIT

Science

sturdy

Sturdy is a library for developing sound static analyses in Haskell.

  • Quiet
  • Other
  • GitHub
  • ★ 64
  • BSD-3-Clause

Other

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

MarkdownProcessor

A Markdown Processor Library for Delphi, to process and convert markdown files to HTML.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 56
  • Apache-2.0

Other

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_Utils_Library

A library with some useful utilities for your Delphi Apps.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 37
  • BSD-3-Clause-Clear

Other

Badger

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 36
  • MIT

Networking

Vidi

The Vidi Language

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 31

Language Tools

gmlib_v2

Google Maps Library v2 is an open source library that encapsulates the Google Maps API.

  • Active
  • Package
  • Lazarus and Delphi
  • GitHub
  • ★ 30

Graphics

KittoX

A Delphi framework for creating data-driven WEB SPA applications with HTMX

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 26
  • Apache-2.0

Networking Database

maXbox4

code compiler script studio

  • Active
  • Application
  • Lazarus and Delphi
  • GitHub
  • ★ 26
  • GPL-3.0

Language Tools

tokio4delphi

High-performance async/await library for Delphi, powered by Rust's Tokio runtime.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 19

System

web3.pas

web3.pas is a SDK for creating decentralized web apps in Delphi.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 18
  • GPL-3.0

Networking

XIDE

This Lazarus project provides a RAD IDE for Free Pascal in the browser (Chrome) or desktop.

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 17

Language Tools

trndi

Trndi - CGM monitoring app

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 13
  • GPL-3.0

Science

ashley

Ashley is an all-in-one, single-click local AI assistant. It bundles an llama.cpp LLM inference engine, a Symfony/PHP web chatbot interface, a CEF-based web client (PHP Desktop), and a service manager (written in Free Pascal) into one package - no Internet connection or cloud API key required at runtime.

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 7
  • Apache-2.0

Applications

BlaiseVue

The Universal Reactive Framework for Object Pascal. Build modern Web (SPA/SSG), Native Mobile (Android/iOS), and Ultra-light Desktop apps from a single Pascal codebase.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 7

Other

CXComponents

A collection of custom UI components for Lazarus.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 6
  • MIT

GUI containers

pizarra

A vendor-neutral control plane for autonomous, cooperating AI-agent teams.

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 6
  • GPL-3.0

Other

BeBop

BeBop framework is a development tool to create cross-platform desktop applications using JavaScript, HTML, and CSS.

  • Quiet
  • Application
  • Lazarus
  • GitHub
  • ★ 5
  • MIT

Language Tools

wirth1976

Niklaus Wirth's Algorithms + Data Structures 1976 in Python, JavaScript, Scheme, and Pascal

  • Quiet
  • Other
  • GitHub
  • ★ 5

Learning and Examples

Delphi-RAG-Lint-Graph

Experimental pure-VCL interactive graph viewer for the Delphi-RAG-Lint symbol index: drill-in graph, structure panel (uses/init-final), search, click-to-jump into RAD Studio. Alpha.

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 4
  • MIT

Applications

CrossGraph

A plotting engine and a visual component that draw what MathParser computes: curves with their discontinuities, intersections and extrema, cartesian and polar systems, and surfaces z = f(x, y) with contour lines. The engine samples on worker threads, knows nothing about a canvas and builds headless; the component is a thin layer over it. Free Pascal 3.2.2 and newer builds it: the sort in CrossVision.Geometry that once needed function references is written out in the same unit. Delphi 10.2 Tokyo and newer builds it as well.

  • Active
  • Package
  • Lazarus and Delphi
  • GitHub
  • ★ 4
  • MIT

Charts and Graphs In the Online Package Manager

BonziClaude

Desktop companion powered by Claude Code's buddy_react API. BonziBuddy meets Claude.

  • Active
  • Application
  • Lazarus
  • GitHub
  • ★ 3
  • MIT

Applications

spintax-win

Framework-agnostic Spintax engine for Object Pascal — enumerations, permutations, scoped variables, conditionals, plural agreement, includes, full post-processing. Zero dependencies, MIT, Free Pascal 3.2.2+. Parity-gated by the shared golden corpus that also gates @spintax/core.

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

Other

base

GDI.js host application that implements win32 api calls into v8 javascript interface

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 2

System

Delphi_pimono

A desktop AI coding assistant built with Delphi

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 2

Applications

AceUtitlies

A Windows application that actually search Windows for files! What an idea? Also a Windows 11 Notepad replacement and a few other miscellaneous utilites.

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

Other

asteria

Prototyping a framework for JavaScript that works on the desktop

  • Archived
  • Application
  • Lazarus
  • GitHub
  • ★ 1

Other

CodeEdit

Code Editor Component For Delphi

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 1
  • MIT

Edit and Memos

fpf

  • Active
  • Library
  • GitHub
  • ★ 1
  • AGPL-3.0

Other

HP48desktop

:floppy_disk: An old HP48 archive manager & Xmodem transfer tool that I wrote in Turbo Pascal under DOS in the 90s.

  • Quiet
  • Application
  • GitHub
  • ★ 1

Files and Drives

json4d

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 1
  • MIT

Other

LMStudioClient

A simple Delphi application to communicate with LM Studio via it's api

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 1

Other