Lazarus is a free cross-platform visual integrated development environment (IDE) for rapid application development (RAD) using the Free Pascal compiler, which supports dialects of Object Pascal, to varying degrees.
License: Open Source
Lazarus is an open-source Pascal IDE known for its strong community and extensive component libraries, making it ideal for traditional desktop applications. Ultimate++, on the other hand, is geared towards performance and modern GUI applications, offering efficient tools for mobile development and a more streamlined setup.