We've been exclusively working on ASPSecurityKit v3 for last 10 months.
you can try it out on https://ASPSecurityKit.net/try-for-free
ASK supports six web frameworks (related to .NET as of now) and in addition to the library packages, it also provides source packages (for both MVC and API projects) which are drop-in source code functionality covering such common things needed in every web app: profile (change username/password/firewal/etc.), email verification, 2-factor, forgot password, user management, administration, localization etc.