There aren't any.
Someone is paid to conduct the training and the managing broker looks to re-coup that cost from YOU as you begin generating income for the brokerage. If it was truly free you wouldn't want it. Anything that costs nothing is worth exactly that - nothing.
You don't need training, anyway, you need mentoring. The big difference is experience. Forget webinars, classrooms and dancing gurus who try to hold you "accountable." You don't need any of that, nobody does. The fastest way to ramp up your knowledge, skills and income is to hook up with a mentor who involves you daily in real-world transactions. Consider what you want to do in real estate and find a mentor who knows that side of the business and is willing to take you on. It doesn't matter where that mentor hangs his/her license, or even if the mentor is an independent. Brokerages don't make a great agent - you have to do that for yourself. But start with mentoring and forget training, it went out of style in the days of disco.