BuddyPress: Don't Load Gravatar for Member Avatars
Stops BuddyPress from requesting Gravatar images for members without an uploaded photo and uses the local mystery-person image instead, for privacy and speed.
Snippet Library
Users snippets for WordPress
Snippets for user accounts, roles and profiles: extra profile fields, new columns in the users list, last-login tracking and tighter control of what each role can do. Handy for membership sites, client sites and teams with many authors.