Much closer to what I need than previous contenders! Now, if only it were open source (compile on your own) and was embeddable (as a web component?) for easy integration into other platforms...
At the moment, I'm not planning to, just cause right now it's my own mess of code, and I feel like bringing on extra people would give me a bit more managerial work than I'd like.
That being said, it's all plain javascript, there's no backend, nothing is really stopping people from looking at all the source code