Ultimaker Cura is the world's most popular 3D slicing application for 3D Printers.

PrusaSlicer is a free and Open Source, cross-platform application for 3D printing.

Bambu Studio is a 3D printing slicer designed for the novice and with power users.

Bforartists is an Open Source 3D suite to create CG content.

Blender is a free and Open Source 3D animation suite that supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing, motion tracking, even video editing, and game creation.

ideaMaker is a powerful 3D slicing application that prepares your 3D models for printing.

FreeCAD is a parametric 3D modeler for CAD, MCAD, CAx, CAE, and PLM aimed directly at mechanical engineering and product design.

Marlin is a straightforward Open Source firmware designed for the RepRap family of 3D printers.

Fusion 360 is a professional cloud based Integrated CAD, CAM, CAE, and PCB software program.

Spin 3D is a freeware file converter that can convert STL, 3DS, 3DP, 3MF, OBJ, PLY, and other 3D file formats.

Meshmixer is state-of-the-art software for working with triangle meshes. Meshmixer is no longer updated or supported.

3D Builder from Microsoft lets you view, create, and personalize 3D objects.

ZBrushCoreMini is designed for new artists of all ages, with a streamlined interface that lets anyone jump right in and start sculpting immediately.

3D Slash claims to be the easiest way to create in 3D using their web interface or the app.

Tinkercad is a free, easy-to-use app for 3D design, electronics, and coding. It's used by teachers, kids, hobbyists, and designers to design and make anything.

SketchUp is an easy-to-use web-based program that will help you learn to create 3D models of houses, sheds, decks, home additions, woodworking projects even spaceships.

Slic3r is mainly a toolpath generator for 3D printers that can read 3D models (STL, OBJ, AMF, 3MF) and convert them into G-code instructions for 3D printers.