We released our latest version of OneStepCheckout for Magento 2 last week: v1.2.20.
It is compatible with Magento version 2.1.3 and up and is tested with version 2.2.3.
Here are the key features:
- Coupon Code field
- Order Comment box
- Create an account by adding a password + validation NEW!
(and notice our OneStepCheckout branded bags hehehe)
For more details you can read our changelog here.
It is compatible with all third party extensions that are coded following the Magento 2 guidelines including PayPal, Sage Pay, IDeal, Maestro etc… We also fixed compatibility with AfterPay Australia, TIG Post NL and many more.