CEF4Delphi is an open source project to embed Chromium-based browsers in applications made with Delphi or Lazarus/FPC for Windows, Linux and MacOS.

Skia4Delphi is a cross-platform 2D graphics API for Delphi platforms based on Google's Skia Graphics Library. It provides a comprehensive 2D API that can be used across mobile, server and desktop models to render images.

Indy - Internet Direct

Four advanced components to simplify use of SVG images and SVG icons into ImageList: TSVGIconImage, TSVGIconImageCollection, TSVGIconVirtualImageList, TSVGIconImageList (for VCL and FMX). Choose the preferred engine to render SVG (Delphi Image32, SKIA4Delphi, Direct2D);

WebView4Delphi is an open source project created by Salvador Díaz Fau to embed Chromium-based browsers in applications made with Delphi or Lazarus/FPC for Windows.

Delphi's VCL library as a Python module for building Windows GUI

Four advanced components to simplify use of Icon Fonts as images and ImageList: TIconFontImage, TIconFontsImageCollection, TIconFontsVirtualImageList, TIconFontsImageList (for VCL and FMX). Full support for High-DPI apps. Rendering optimized with GDI+

Expertiza is a web application through which students can submit and peer-review learning objects (articles, code, web sites, etc). The Expertiza project is supported by the National Science Foundation.

Open Source Library for connecting Firebase by Delphi VCL/FMX

DevExpress VCL Components Automatic Installer

Free ErrorSoft Components for Delphi (VCL) & EsVclCore lib

zControls

Grid control for Delphi and C++ (VCL and FMX)

A collection of VCL/LCL components for Delphi/Lazarus - buttons, panels, LinkLabel, ProgressBar, ColorComboBox, ColorListBox, Timer and other

Delphi and Lazarus Message Dialogs with Formatted Text

Varnish 3 to 4 migration script

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

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

falco is a VCL parser and linter optimized for Fastly

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