gossip and morespeech are the graphical desktop clients I'm aware of.

As for follower count, it is expensive and unreliable to compute. You need to ask for every ContactList that includes you, from as many relays as you can, and then unique the authors returned. If you have 1000 followers, that's up to 1000 ContactLists returned PER-RELAY, and ContactLists can be very large events.

Gossip does not count this. Narcissists can use a command line tool from time to time to do this count. I have one that is unpublished, maybe I will publish it.