The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure.

JSCAD is an open source set of modular, browser and command line tools for creating parametric 2D and 3D designs with JavaScript code. It provides a quick, precise and reproducible method for generating 3D models, and is especially useful for creating ready-to-print 3D designs.

A physics-based multi-material FDM color system. Converts images to full-color 3D prints via calibrated light-transmission mixing. Supports 2-8 color systems with slicer-ready 3MF export (BambuStudio/OrcaSlicer).

A simple CAD package using signed distance functions

Open-source app for turning images into stacked, color-layered 3D prints. Optimize filament order with physics-based auto-painting, preview every layer in 2D and 3D, calibrate filament hiding distance, and export print-ready STL or 3MF files.

Connects MCP to major 3D printer APIs (Orca, FULU's Orca/Bambu, OctoPrint, Klipper, Duet, Repetier, Prusa, Creality). Control prints, monitor status, and perform advanced STL operations like scaling, rotation, sectional editing, and base extension. Includes slicing and visualization.

MCP server for Bambu Lab 3D printers — STL manipulation, BambuStudio slicing, and direct printer control

Fast visual 3d diff for STL, OBJ, 3MF, and STEP files

A local web-tool for painting 3D models for 3D printing in CMY

Maker's Pet Loki - a 200mm 3D-printed DIY pet robot compatible with Kaia.ai robotics software platform

3D Manufacturing Format (3MF) implementation for Go

C# .Net Core wrapper for the Open Asset Import Library (Assimp)

Build123d in the browser!

Blender 4.2+ add-on to import/export 3MF files

Viewer and converter for STL, 3MF, OBJ, PLY, GCODE files

STL Vault - A containerized 3D Model library manager and organizer, focused on 3D printing.

A lightweight Python script to clean .3MF files by removing unnecessary metadata and other data. See the README for more details.

3MF model viewer app for macOS

Maker's Pet Snoopy - a 300mm 3D-printed DIY pet robot compatible with Kaia.ai robotics software platform

The premier .3mf thumbnail viewer for file managers in Linux and Windows.