Alternatives to Mayo
An open-source 3D CAD viewer and converter for STEP, IGES, STL and other formats. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Mayo
An open-source 3D CAD viewer and converter for STEP, IGES, STL and other formats.
Replacements
Listings that take over the same core job as Mayo.
F3D
A fast, minimalist open-source viewer for 3D models, CAD files, scans and volumetric data.
F3D is a minimalist open-source viewer for 3D models, CAD files, scans and volumetric data, with a web version, but it offers no format conversion like Mayo's.
MeshLab
The standard tool for cleaning up messy 3D scan data: fill holes, remove noise, simplify and convert between mesh formats.
MeshLab converts between most mesh formats and adds deep repair and simplification filters, but it focuses on scan meshes rather than STEP and IGES CAD files.
Similar software
Related functionality, not a direct replacement.
FreeCAD
A parametric 3D modeller for real objects: design by sketching constrained 2D shapes, then change the parameters later.
Manyfold
Self-hosted web app for organising, previewing and sharing a library of 3D print files.
Blender
The free 3D creation suite: modelling, sculpting, rigging, animation, simulation, rendering, compositing and video editing.