General login page for all users?

Hello, does a general login page exists for all users to access their apps?
The main page "/webtools/control/main" has a login link that sends me to the
admin login page "webtools/control/checkLogin" BUT only the admin can login
here... all other users get an error.

Is there a login page for all? Where anyone can login to access their
specific apps?

For example in Opentaps, once you log in with any user, then you can see the
apps you have access to. So what's the best way to achieve this in Ofbiz?
(and please don't say the best way is to give each user the specific app URL
- i don't find that very user friendly :p )

Also, what's the purpose of the main page at "/webtools/control/main" only
thing there is a login link that simply sends you to the admin login page...
How can I modify this page, and is it possibly get it to act as the main
login page as explained above? I will have to modify this page, because when
I log out it sends me there.

Thank you for taking the time to read this :)