Rename Email - Easily change the subject of any email, by cloudHQ
Cotter - One-click phone number login and checkout
WhoApp - Know who's calling before you answer
Feather Auth - Build an entire sign-in flow in 5 minutes or less.
Rapid 2FA - A painless way to add two-factor authentication to your site
Authpack - Complete user auth system installed with 8 lines of code.