Blender 
Blender is an ultra-realistic rendering software which utilizes GPU and CPU rendering for applications like video editing, modelling, simulation, sculpting and more. It is an open-source 3D creation suite and supports the entire 3D pipeline with the likes of animation, rigging, compositing, rendering motion tracking, simulation, and modelling. Blender is often suited for every individual as well as small studios that benefit from a unified pipeline and the process of responsive development. This software is cross-platform and can run equally well on Windows, Linux, and macOS systems. Its interface uses OpenGL to provide a consistent user experience. As a community-driven project under the GNU General public license, the public is empowered for making small and large changes to the base code. This assists in addition of new features, better  usability, and responsive bug fixes.

Why you must get it: 
Blender is a 3D open-source software. It has a path-tracer engine for real- time rendering which can also be sped up. The users can create 3D games, film animations, scripting, and other visual effect features. Additionally, it provides animation and rigging tools that are often used to create short films.