The walker rig is free. It is very handy for students to advance their body mechanics skills.It has UI for selection and customization.In order to run UI properly place walker.mel to c:\Users\User\Documents\maya\2016\scripts\ folder. Place walker.png to c:\Users\User\Documents\maya\2016\prefs\icons\ folder.How to video is here. https://vimeo.com/218158181