Memorizing logins for all your domains, servers and accounts can be nearly impossible, not to say a nightmare. DomainBrain is a smart little app that stores all this information in one place for you.
Webmasters and other techie types will be glad to know you can not only store basic domain info but also FTP/webdav data, content management, hosting and registrars.
The interface is well laid out and you can create nested folders, extremely useful if you need to store information from many sources. DomainBrain even lets you protect all your information with a password, and hide your own passwords, so that no one has access to your precious information.
While DomainBrain gives you quick access to your urls, it's a shame it doesn't serve up integration with Apple's Keychain, as that is another excellent tool which lets you easily store information safely, and what's more, for free.