All in One SEO Pack - http://wordpress.org/extend/plugins/all-in-one-seo-pack/
WP-DB-Backup - http://wordpress.org/extend/plugins/wp-db-backup/
COntact Form 7 - http://wordpress.org/extend/plugins/contact-form-7/
Dagon's Sitemap Generator - http://www.dagondesign.com/articles/sitemap-generator-plugin-for-wordpress/
Google Sitemap Generator - http://wordpress.org/extend/plugins/google-sitemap-generator/
My Page Order - http://wordpress.org/extend/plugins/my-page-order/