Thanks so much for reaching out and for your interest in our products!
None of the external sources that you listed are required in order for our plugins to work properly.
With a fresh WordPress install, you can use our plugins right out of the box. Depending on which plugins you are interested in, you may want to incorporate an e-commerce solution of your choice, however that may not even be necessary if you use the Tribe Commerce functionality within Event Tickets Plus.
Let me know if you have any other questions!
Thanks,
Jaime