For anyone looking for further information on Exo Integrations, I strongly recommend they look at the specific Developer forum for the Exo API:
https://community.myob.com/t5/EXO-API-and-Partner-Add-ons/bd-p/EXOAPI
Please note, the above forum is available to Exo API Developer Partners only, but you can sign up for free to become an Exo API developer (and read the documentation) here:
https://developer.myob.com/api/exo/exo-api-overview/
For anyone thinking of purchasing an Exo API license, or having a developer develop something using the Exo API, I would strongly recommend consulting with your business partner before doing so. Many business partners offer integration services already, or can offer advice between the large numbers of integrations currently on the market.
You can see a number of these at the MYOB Add on Solutions page, if you search for Exo certified products:
https://www.myob.com/au/addons/list/#!/workswith/myob-exo
But there are extensive numbers of applications developed by various businesses that may suit your needs. Again, your business partner is the best first port of call as they will likely have experience with products/services that may assist you.