SketchUp Make
SketchUp Make is a best in the class CAD software capable of performing 2D and 3D rendering and designing, however, best for the 2D projects.
7 Alternatives To SketchUp Make
BRL-CAD
BRL-CAD: Open Source Solid Modeling
KiCad
A Cross Platform and Open Source Electronics Design Automation Suite
LibreCAD
An open source 2D CAD application for Windows, Apple and Linux.
OpenSCAD
OpenSCAD is a software for creating solid 3D CAD objects.
QCAD
QCAD is an application for computer aided drafting in 2D.
SolidWorks
Dassault Systèmes SolidWorks Corp. develops and markets 3D CAD design software, analysis software, and product data management software. SolidWorks is the leading supplier of 3D CAD product design engineering software.
nanoCAD
nanoCAD is a pro-grade 2D CAD system with native DWG support and full customizability.