Routing ticket evenly among agents

No, there's not, unfortunately. Despite years of requests dating back to 2009, this is still not possible. 
https://support.zendesk.com/hc/en-us/community/posts/4409222757786-Round-Robin-assignment


They have implemented something else called "omnichannel routing", but it's limited in what account types are allowed to use it, and if you use Messaging, it dumps all offline messages onto a single agent when they sign in, by design. There's plans "on the roadmap" to allow accounts to adjust this behavior but basically, no, there's no actual round robin capability to this day.