BuddyPress.org

I can speak to the ones I’ve written here.

Update friendly: BP Group Management, Enhanced BuddyPress Widgets (as long as you’re using the most recent version), Invite Anyone.

Not necessarily update friendly: Group Forum Subscription, which I haven’t updated for BP 1.2 so is use-at-your-own risk at the moment (I recommend https://wordpress.org/extend/plugins/buddypress-group-activity-stream-subscription/ instead).