[skill grade] register form

Hi,

I would like to setup a kind of skill’s grade input in the register form in order to member are able to see each other their skill.
Like this for exemple

http://img102.xooimage.com/files/9/f/4/syst-mecomp-tences-46ac5cb.png

If someone know a plugin wich allow me to add those fields in my register form, je will bu thankful ! 🙂