Open-source, industry-standard, fully free for commercial use.
OpenCL-supported graphics card is essential for accelerating simulation tasks. Alternatives SideFX Houdini 19 Free Download
Houdini Apprentice is the free version of Houdini FX, designed for students, hobbyists, and artists to learn and create. It provides access to almost all features of the commercial FX version, including: designed for students