Grails Security Plugin
Straightforward security you can understand.
github.com/center-key/bookstore
Tags
<security:username />
<security:isAnonymous>...</security:isAnonymous>
<security:isSignedIn>...</security:isSignedIn>
<security:signUpLink />
<security:signInLink />
<security:signOutLink />
<security:authToggleLink />
<security:signUpForm />
<security:signInForm />
Screenshots
1. Sign in link
2. Sign in form
3. Sign up form