Being able to manage access to specific directories with usernames and passwords is a fairly easy thing to do with htaccess on Apache server. There are many websites that offer help for this. However, if you need to manage users on a regular basis, having a tool for doing so is really helpful.
Directory Pass is one such tool. I’ve been using it at work for close to a year now and while it’s not perfect, it gets the job done with pretty simple ease of use. The only real pain I’ve had with using it was clicking the “Disable Password Protection” link once only to discover it didn’t save any of the former settings. Disable is really delete. Otherwise, this has been a great little tool to use and it’s open source, too.