FF I - choose a job, then upgrade it

FF III - you get better jobs as you go

FF V - jobs are more balanced - mix and match abilities

FF X-2 - no mixing and matching, but you can change them in battle

FF XI - main job+ sub job

FF XIV - just change your weapon/cross-class abilities

FF Tactics - learn abilities from various classes to unlock new ones

FF TA - same as above, but require a bit less effort and are race-exclusive

FF TA2 - as above, but more advanced classes need to be unlocked through sidequests

FF Dimensions - FF V's system, but the jobs are split between the Warriors of Light and Darkness

FF: 4 Heroes of Light - Crown system - upgrade jobs by adding gems

Bravely Default - basically the FF V system on steroids