Blender is a free and open-source 3D computer graphics software toolset used for creating animated films, visual effects, art, 3D printed models, motion graphics, interactive 3D applications, and computer games. Blender's features include 3D modeling, UV unwrapping, texturing, raster graphics editing, rigging and skinning, fluid and smoke simulation, particle simulation, soft body simulation, sculpting, animating, match moving, rendering, motion graphics, video editing, and compositing.
Blender has started a Long Term Support (LTS) pilot program aht aims at ensuring that long-lasting projects can be accomplish using a stable Blender version. Those LTS release will provide critical fixes for a period of 2 years.
Any critical fixes found in an higher release will be back ported to LTS release as well.
For more information, you can visit Long-term Support Pilot