There are bits and pieces around. 3DBuzz' Fundamentals is free and excellent (good teaching style, need to stick with the long tutorials).
Beyond that free stuff is patchy (unlike Blender which is well supported by a community - difference between free and commercial products).
Anyone out there - could do with some simple project based workflows in H11 please; model and rig a simple character, general modelling in Houdini…
Eric
Eric