nanoCAD offers a more comprehensive set of features for 2D and 3D drafting, making it suitable for professional use, while QCAD is a lightweight, open-source alternative ideal for simpler projects and users who prefer a free solution.
QCAD
Pros:
Open-source and free
Lightweight and fast
Cross-platform compatibility
Simple and intuitive interface
Active community support
Cons:
Limited advanced features compared to commercial software