Blender is free modelling, rendering, sculpting, animation, rigging and story drawing software.
At the top we find the menu, File, Edit, Render, Window, Help and then starting with Layout a number of different layouts. Right below it the info bar. On the left we find a vertical oriented toolbar. In the centre the perspective view, which shows your scene with all the 3D objects. Top right we find the outliner, a hierarchy view of all the objects in your scene. Below the outliner we find the properties panel and at the bottom the timeline.