I have spent quite a bit of time working in enterprise software. My team has built our flagging solution and used some prevalent solutions. I have always felt like there is some middle ground between the highly complex flag solutions and the quick build-your-own solution.
Zenmanage is what I feel is the middle ground. It has many core features around feature flagging, like multiple environment support, flag types (boolean, string, or number), and support for context rules to customize how a flag is evaluated based on the user (or other context attribute).
I want to grow Zenmanage into a first-class solution for settings and feature flag management in the future but find ways to continue making the project as easy to use as the first release.