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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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validator

Simple Validation Library for Object Pascal (Delphi / Lazarus) Applications

  • Quiet
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 1

Other

Validator4D

Fluent form validation mechanism for Delphi FMX.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 9
  • MIT

Dialogs

pascal-manifest-validator

Free Pascal CSV manifest validator demonstrating records, units, file handling, FPCUnit tests and learning foundations

  • Active
  • Library
  • Lazarus
  • GitHub
  • ★ 1
  • MIT

Other

AMKA-Validator

Validates AMKA (Greek Social Security) numbers.

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 1

Other

datavalidator

DataValidator foi projetado para ser uma biblioteca simples de validação de dados.

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 52
  • MIT

Other

delphi-entities-validators2

Delphi Entities Validators 2 is a small framework that provides an easy and ready-to-use interface for entities validation with binding to controls on the form.

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

Other

VCL-Valid-IBAN

Delphi VCL Lib IBAN Valid and Generate.

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 15
  • MIT

Other

ValidadorXML

Validator and XML Reader : NF-e, NFC-e, NFS-e, MDF-e, MF-e and CT-e.

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 3

Applications

ValidatePythonEmbeddable

Validate python embeddable distribution configuration & PIP Packages. GUI validators written in Delphi.

  • Quiet
  • Application
  • Delphi
  • GitHub
  • ★ 3
  • Apache-2.0

Language Tools

JSON Toolkit for Delphi and Freepascal

The Json toolkit is a parser/writer/validator for JSON data format. This toolkit is designed to work with Delphi and FreePascal (win32, win64, linux32, linux64, MacOSX Intel)

  • Library
  • Lazarus and Delphi
  • SourceForge
  • Mozilla Public License 1.1 (MPL 1.1)

Language Tools

C++ Web services

wsdlpull is an efficient and powerful command line utility for dynamic inspection and invocation of WSDL web services.It provides a C++ library with dynamic WSDL invocation API,WSDL parser,Schema parser and Validator and an xmlpull Parser/Serializer.

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

Networking

DFValidator

A powerful, fluent validation library for Delphi applications that makes data validation clean and easy

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 7
  • MIT

Other

horse

Fast, opinionated, minimalist web framework for Delphi

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

Networking

LGenerics

Generic algorithms and data structures for Lazarus/Free Pascal

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

Other

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

SwagDoc

Create a public documentation REST API using Swagger 2.0 or Open API 3.2.1 for Delphi.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 108
  • Apache-2.0

Networking

fastplaz

FastPlaz - Pascal Web Framework

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 105

Networking

JsonToDelphi

generate delphi classes from json (Json To Delphi Class Generator / JSON Data Binding Tool FMX, VCL and uniGUI)

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 76

Language Tools

MCPConnect

Building MCP servers with Delphi

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

Networking

EmailValidationPascal

Simple Class for Validating Email Address Syntax in Pascal/Delphi

  • Quiet
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 39
  • MIT

Networking

mcp-server-delphi

MCP (Model Context Protocol) server library for Delphi. Built on DMVCFramework, it lets you expose tools, resources and prompts via attributes and RTTI. Supports both HTTP Streamable and stdio transports. MCP 2025-03-26 compliant.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 32
  • Apache-2.0

Networking

XRechnung-for-Delphi

XRechnung/ZUGFeRD/Peppol BIS Billing Implementation for Delphi and FreePascal

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 31
  • GPL-3.0

Reporting

InfraFramework4Delphi

API that provides a base infrastructure for the Delphi application development using a layered architecture.

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

Other

KittoX

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

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

Networking Database

IAMClient4D

IAMClient4D is a Delphi client library for integrating applications with Keycloak, providing full OAuth2/OpenID Connect support (including PKCE), token and user management, and a lightweight asynchronous task framework (Async.Core) for thread-safe operations across VCL and FMX.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 24
  • Apache-2.0

Security Networking

ZUGFeRD-for-Delphi

ZUGFeRD / Factur-X Implementation for Delphi

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 23
  • Apache-2.0

Other

delphi_fake_data_utils

Simple unit to generate fake data for demo, samples, testing etc.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 17
  • Apache-2.0

Other

stringkit-fp

Comprehensive string toolkit for Free Pascal and Lazarus with 80+ operations for case conversion, validation, fuzzy matching, parsing, encoding, phonetics and text analysis. No third-party dependencies.

  • Active
  • Package
  • Lazarus
  • GitHub
  • ★ 16
  • MIT

Other

wfc

wave function collapse algorithm

  • Active
  • Application
  • Lazarus and Delphi
  • GitHub
  • ★ 12
  • MIT

Games and Game Engines

DJSON

DJSON is a JSON implementation for Delphi 7 and Lazarus (FPC)

  • Quiet
  • Package
  • Lazarus and Delphi
  • GitHub
  • ★ 10
  • MIT

Other

velox-ui

VeloxUI — High-velocity, zero-dependency Object Pascal (Delphi VCL & Lazarus/Free Pascal LCL) desktop MVVM & Windows 11 Fluent UI micro-framework: DWM Mica, undocumented uxtheme dark scrollbars, GDI+ vector cards, High-DPI control fixers, flicker-free generic OwnerData virtual grids, and NT Kernel helpers.

  • Active
  • Library
  • Lazarus and Delphi
  • GitHub
  • ★ 8
  • MIT

GUI containers

horse-dto

Middleware de auto-binding e validação declarativa de dados para o Delphi Horse. Realiza a desserialização automática do payload e executa validações baseadas em atributos customizados antes do controller, eliminando códigos repetitivos (boilerplate).

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 7
  • Apache-2.0

Networking

DValidation

DValidation - An implementation of the Bean Validation Specification for Delphi

  • Quiet
  • Library
  • Delphi
  • GitHub
  • ★ 6
  • Apache-2.0

Other

Formula4D

A typed formula and business-rule engine for Delphi, with validation, traceable execution, and portable JSON rule packages.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 6
  • MIT

Other

IridiumSimulator

Interactive desktop simulator for systems biology

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 6
  • MIT

Science

delphi-aikit

Utilities for AI-assisted Delphi code analysis and builds.

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 5

Language Tools

SkillsORM

# SkillsORM — Skills Pack para desenvolvimento Delphi/FPC com IA

  • Active
  • Other
  • Lazarus and Delphi
  • GitHub
  • ★ 5

Other

Catmandu-PICA

Catmandu modules for working with PICA+ data

  • Quiet
  • Other
  • GitHub
  • ★ 4

Other

DelphiAPIStarterKit

DelphiAPIStarterKit is a clean and reusable starter template for building RESTful APIs and web services with Delphi WebBroker. It provides a structured project foundation, routing, request handling, response helpers, and practical examples to speed up backend development.

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 4
  • Apache-2.0

Networking

jquif

JQuery UI Freepascal

  • Quiet
  • Library
  • Lazarus
  • GitHub
  • ★ 4

Networking

nxmcp

MCP for NexusDB

  • Active
  • Application
  • Delphi
  • GitHub
  • ★ 3
  • MIT

Database

quantumshield4d

Post-quantum cryptography for Delphi 7–13. ML-KEM, ML-DSA & SLH-DSA via CNG, OpenSSL 3.5 and liboqs. FIPS 203/204/205 compliant. Auto backend selection. D7-safe, zero external dependencies at compile time. Community Edition (MPL 2.0).

  • Active
  • Library
  • Delphi
  • GitHub
  • ★ 3
  • MPL-2.0

Cryptography

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