What are you looking to do?

I am a fan of MeetFox for scheduling and billing for 1:1 coaching sessions.

www.shaunnestor.com/recommends/meetfox

For training software, there are a million options depending on what you need. I am playing with Wishlist Member right now. Teachable is a decent option for getting started quickly and inexpensively.

Let me know what - specifically - you're looking for and I can probably recommend something more fitting.