calefaction/app/views/tools/index.html.erb

<h1>Tools#index</h1>

<p>
    Users:
    <%= link_to "Signup", controller: "users", action: "create" %>
    &bull;
    <%= link_to "Login", controller: "users", action: "login" %>
</p>
<p>
    Admin:
    <%= link_to "Admin", controller: "admin", action: "index" %>
</p>
<p>Tools: ...</p>

<p>[Site description]</p>