Yes there are some and since they do NOT modify the code of the game, they are not against the rules, at least that's what most people think and no one has ever been banned for using them. All they do is read the information the chatlog presents.
Just google for "ffxiv parser" and you'll find them.

@leveling up other classes first:
It's not THAT big of a deal to not have BfB or Mantra right away. If you enjoy the story, just finish it (the initial one, until you see the credits roll) with your main class and then level up everything else that might be useful to your main class. The story encounters are so faceroll easy anyway that it's not noticable when someone has one Dmg Buff less for 20 seconds when the whole fight takes less than a minute.
Also, like others said, the bigger the gap between your highest class and the lower ones is, the more exp you get on the lower ones when leveling them up
None of the cross-class skills for BRD will matter until you hit endgame, and tiring yourself out with leveling several classes to 40+ before you ever experience anything epic made several people leave the game early on because they felt they were just grinding and grinding without any real payoff.