Samuel Wood (Otto)

A plugin that lets you quickly and easily create new plugins.
Install, activate, and then go to the Plugins->Create a New Plugin menu to create and activate a new blank plugin, live, on your site.
After the plugin is created, you’ll be taken directly to the Plugin Editor screen, to type or paste in your new plugin’s code.

Pluginception

A plugin that lets you quickly and easily create new plugins.

Valentin Agachi

Create Posts & Terms helps with automatically creating a list of new pages, posts & custom post items with dummy content. The items can be nested and can have custom fields & terms assigned upon creation.
It also allows you to create a list of categories, post tags & custom taxonomies terms.

Create Posts & Terms

Create pages, posts, custom post items, categories, post tags & custom taxonomies terms in bulk.

Pluginception vs Create Posts & Terms