by Mike Schinkel on WordPress.org
Omits Parent Page Templates from the "Page" edit screen in the WordPress admin.
This plugin does what it names says; it omits page templates from the parent theme from the template dropdown when you are editing a “Page” in the WordPress admin.
The Ribbon Manager plugin give the ability to add a side ribbon on the blog without touching the template file or the css.
Pages Autolink automatically turns page names in posts and pages in links to the corresponding page URLs. Keeps the original words case in text.
Maintenance mode for WordPress with many settings