The WordPress plugin, OneClick does something pretty dang interesting. What it does is, it takes away the need to really need to ftp into your host.
Now, I’m not certain this plugin is the greatest to use depending on if there are security holes that potentially could make this a unnecessary nightmare due to the permissions you supposedly have to grant it. Although truthfully, you’re not granting much when you realize that the folders that it asks for are already 755.
In ANY case… what it does, is that it allows you to install plugins and patches directly from URLs or local files. This gets rid of one extra step and makes it a lot more simple in doing updates and other types of plugins. True to its name, it’s only one click.