Creates a functionality plugin where you can add your functions.php code snippets.
First of all, backup all of the code in your functionality plugin. Then deactivate both this plugin and your functionality plugin from the WordPress admin. Delete your functionality plugin (it will be called your site's name), and then reactivate this plugin.
With pleasure! Once this plugin has been activated and the functionality plugin created, all it does is create a link in the WordPress admin menu for easily editing the functionality plugin. If you don't want this, feel free to delete this plugin.
This plugin is more suited to people who only have a few snippets and prefer editing a file to using a graphical interface. If you have a few snippets and like to be organized, you might feel more at home using the Code Snippets plugin, which is also created by me.
Yes, in that they are both a plugin for creating plugins. However, this plugin is a bit more easier to use and specific than Pluginception.