State Management regroups all solutions used to manage data, both on client and server.
On the client Redux is still the uncontested leader, but the rise of GraphQL might end up shaking things up: the huge wave of interest it's generating might help push libraries like Relay Modern and Apollo in the near future.
Per-library survey results.
Number of Libraries Used
How many different libraries are developers using (defined as respondents who picked “have used before and would use again”)?
On a scale of one to five, how happy are developers with the current state of State Management tools?