Yes Nostter is being actively developed & maintained by nostr:npub1s02jksmr6tgmcksf3hnmue7pyzlm0sxwarh7lk8tdeprw2hjg6ysp7fxtw & UI front-end design support by nostr:npub194qhhn5vzzyrsqaugfms8c7ycqjyvhyguurra450nhlweatfzxkqy8tgkd .
You can follow them on Nostr, but since it's their personal accounts, it includes a lot of other general discussion also.
Best way would be to check #nostter hashtag for updates on the client