When you have a site that is only accessible for registered users, it might be a pain to login every time - even when your login credentials are filled in automatically. This plugin allows you to configure a specific user-ID and an IP-address (or range of IP-addresses). You are logged in automatically as that user once you visit the site from that IP.
Dealing with offline-pages properly
When developing a Joomla! frontend-site, you probably take the site Offline by modifying the Global Configuration. But it takes more time to finish, you don't want to have your early adapters see an ugly Joomla! offline-message showing a login-box: That gives the wrong message - you do not want them to login at all. So beautifying the offline-page is a good step forward: Put up a nice picture, some text telling everybody to come back in a year or so.
But having no login-box also gives you the problem of not being able to login so easily. This plugin solves that. Just enter your IP-address in the plugin-options, enter the user-ID of the person you want to login as, and you're done: Once you visit your Joomla! offline frontend, you will be logged in automatically. It also works excellent while testing through portable devices (mobiles, tables). No need to type in difficult usernames and passwords.
Ofcourse be aware that there is a security risk. If a hacker decides to spoof your IP-address, he's in. Note that the hacker will still needs to guess that AutoLoginIp is actually, and needs to find out your IP. When the hacker is in, he's only logged into the Joomla! frontend (the plugin doesn't do anything in the Joomla! backend). If you're a bit scared of this to happen (whatever), just configure a Joomla! user with limited rights (so, a Registered user, not a Super User).
Simple but effective: If you are running a demo-site, this plugin is able to show a little notice on all your pages - both frontend as backend.
Development sites are sometimes hosted on publicly available sites, while access is still unwanted. This plugin allows for HTTP authentication based on Joomla! users.
Most people have a PayPal account. why not allow your users to log into your site using this PayPal account? It saves them the trouble of creating a new account manually.