PushLive allows you to have a fully functioning development staging site that you push to the live site when you're ready
A simple plugin for managing your WordPress website with Git.
Content Staging makes it easy to work with content in a private environment before deploying posts, images, users, terms etc. to your live site.
DesktopServer for WordPress
Deploy websites using Git and the admin bar.
"Plug-in to Upload WordPress site Dev to Publish by one click".
Plugin framework, that was designed to speed up plugin deployment and development
Automates the entire process for migrating your wordpress install from a test/development/source server to the live/destination server.
Automatically replicate any plugin setting network-wide: apply sitewide settings. Spread your settings or options on all your multisite blogs. Options
WP Quick Deploy Revisited allows you to either choose plugins from a preset and/or create your own list which you can easily ex-/import & manage.
Add-on to WPML and to WPMU Sitewide tags plugins. Will propagate WPML language properties to the Network wide aggregation blog.
Copy Post allows you to copy posts from one instance of WordPress to another.