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Mayo is an open-source 3D CAD viewer and converter developed by Fougue, designed to provide engineers, designers, and manufacturing professionals with a lightweight yet powerful tool for inspecting, analyzing, and translating mechanical CAD data. Currently at version 0.9.0 and offered through four distinct release iterations, the software supports an extensive range of proprietary and neutral formats—including STEP, IGES, STL, OBJ, and glTF—enabling seamless interchange between popular modeling packages such as SolidWorks, CATIA, NX, Creo, and Inventor without the need for native licenses. Its multi-document interface presents hierarchical assembly trees, precise geometric measurements, sectioning planes, and realistic or wire-frame rendering modes, making it equally suited for quick design reviews on the shop floor, supplier collaboration where intellectual-property protection is critical, and batch conversion workflows that prepare simplified models for simulation, 3-D printing, or AR/VR presentations. Because Mayo remains fully open-source under the LGPL license, technical teams can embed its libraries within existing PLM scripts or customize the graphical shell to match corporate branding while still benefiting from continuous community enhancements. The program is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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