KDevelop 4 is a powerful, legacy Integrated Development Environment (IDE) built on the platform. While modern users typically favor the current Qt 5-based KDevelop 5 , version 4 remains a key reference for developers working on older systems or specific legacy KDE 4 projects. Official Download Sources for KDevelop 4
Since KDevelop 4 is no longer the primary release, it is found in the and historical archives rather than the main download page. Kde4 - KDevelop kdevelop 4 download