We used a system called Facet5 at work once. I'm still not convinced these types of things are actually worth the money in terms of productivity gains but it did seem to do a decent job addressing the biggest flaws with the MBTI (Rates things on a scale and uses a 5th scale that determines the expression of the other 4).

Again, not sure if it actually made any difference in interactions with coworkers but it was kinda interesting.