Doodle3D

Doodle3D is extremely easy to use for first-time 3D model creation for 3D printing. Entirely free and open source, it allows for low-resource or remote locations with unreliable connectivity to use this web-based tool offline by hosting it locally on simpler devices like a raspberryPi. This makes 3D printing a great deal more accessible since most 3D modelling software require expensive computers to install and run, or expensive licensing, or both.