Lazarus

Lazarus is a Delphi compatible cross-platform integrated development environment for Rapid Application Development, built on Free Pascal. It addresses the task of building graphical user interfaces and applications across multiple operating systems, offering a drag-and-drop form designer and a library of ready-to-use components for creating complex interfaces. Applications produced with it can be released as open source or commercial software.

The IDE includes a graphical form designer, over 200 components, and extensibility through packages, along with a Package Manager with an online repository. It supports multiple frameworks and includes a Delphi converter for working with Delphi code. Lazarus is written in Pascal and targets Windows, Linux, macOS, Raspberry Pi, and other platforms, with development pages covering Android, iOS, FreeBSD, embedded, and web development. It is released under GPL/LGPL licenses.

Lazarus is aimed at a broad audience including professionals, students, teachers, scientists, and hobbyists. It is distributed as open source software with stable versions, source code, and packages available for download; no paid editions or trial terms are indicated.