The only one that I know of is LambSoft Movetools.. of course it isn't free but for a reduced price you can rent a one month license from them if this a job specific or one time conversion that you need to do.
Only problem is that you have to beable to install their plugin in both porgramsm so that you export fromm one to the common format and then import the common format into the other program.
Whoever said "the best things in life are free" wasn't a software developer 
g