Code::Blocks is a free, open-source, cross-platform C, C++ and Fortran IDE built to meet the most demanding needs of its users. Developed by Code::Blocks Team
License: Open Source
Code::Blocks is a versatile and customizable IDE suitable for C/C++ development, offering cross-platform support and a rich plugin ecosystem. In contrast, Ultimate++ is a lightweight IDE with advanced GUI design capabilities and a focus on rapid application development, but it has less community support and documentation.