Hi Greg! I am Vadim Voitenko - Greenmask [1] developer that you've mentioned in your message. Thank you so much for your interest.

[1] https://github.com/GreenmaskIO/greenmask

We are trying to deliver new features ASAP according to the user requests, if it not not a secret, could you list the features that you are looking for?

Since 5 days ago we have had a huge major beta release where we introduced important features - dynamic parameters and deterministic transformers and more. Check if there are features you need. If not so, I would love to hear them in order to prioritize them.