Bulk "Add Role" Action on the Users Screen
Adds "Add role" options to the Bulk actions menu on the Users screen, so you can give a second role to many users at once without replacing their current role.
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.