BuddyPress Extended User Groups Widget is a plugin that will display a list of groups that the user is a member of or a list of groups that they manage. There is also a version of this plugin that will display the same for the member whose profile is being viewed.
BuddyPress Username Changer is a simple plugin that allows BuddyPress site members to change their WordPress Username.
BP Better Registration is a plugin that breaks down the BuddyPress Login process into byte-sized chunks, simplifying and extending registration to include uploading the Users Avatar photo, joining groups and adding friends.
BuddyPress Force Profile Photo is a BuddyPress Plugin that forces site members to upload an avatar image before they are able to use any aspect of your site, whichever page they visit they will be redirected to the upload profile image page with a message informing them of this.
Do you want to inform site members of any other site members who have been visiting their profile? Then BuddyPress Profile Visitors provides a simple way of adding a total visit count together with a drop down display of recent visitors, for some sites, it could be the perfect way of people getting to know each others.