SSH connections manager
SSH connections manager
man ssh_config
Well, importing settings from one manager to another is also a problem. It can be solved with a smple script, but you need to learn structure of both configs to write it. Or try to search on github, maybe someone has already solved this.
A tabbed list can be replaced with shell autocompletion. If you name servers in config like _group_subgroup_server, you only need to type few characters and hit Tab to find a server you need.