Ron Rennick

The functionality in this plugin was incorporated into the built in export feature in WordPress 3.0
Working with a single large export file can be difficult. Use this plugin to create multiple export files that contain sections of your blog. This plugin has been tested on WP & WPMU versions 2.7 – 2.8.4. The plugin may work on earlier versions of WP/WPMU.
All restriction options provided in the plugin are optional. If no restrictions are selected, this plugin generates the same export file as the export feature built into WP & WPMU.
Features
Export by any optional combination of:
<ul>
<li>Date Range – Start & end month/year</li>
<li>Author – Same as WP/WPMU built-in export</li>
<li>Category – Export a specific category</li>
<li>Content type – Choose either posts or pages</li>
<li>Post status – Choose Draft, Published, Scheduled or Private</li>
<li>Blog Tag/Category Terms – Choose whether to include the blog’s complete list of Tags and/or Categories</li>
</ul>
Support can be obtained through:
<a href="https://wordpress.org/tags/advanced-export-for-wp-wpmu?forum_id=10#postform" rel="ugc">WordPress Forums</a>

Advanced Export for WP & WPMU

Adds an Advanced Export to the Tools menu which allows selective exporting of pages, posts, specific categories and/or post statuses by date.

Joshua Parker

If you are running a WPMS (Multisite) blogging network, the issue with most login widgets that you add to the main site’s sidebar is that it doesn’t pull the user’s own blog info. That is why the WPMS Sidebar Login Widget was created. Instead of the user trying to remember the login page of their own site/blog, when a user logs into your main site, the widget will conveniently contain links to navigate to 3 different pages of the user’s blog: dashboard, new post page, and profile page.
Features:
<ul>
<li>Link to Network Admin page (only shows if user logged in is a super admin)</li>
<li>Link to user’s dashboard</li>
<li>Link to user’s new post page</li>
<li>Link to user’s profile page</li>
<li>Link to forums page</li>
<li>Subblog registration detection</li>
<li>Custom CSS settings</li>
</ul>
To make sure it works, activate the <a href="https://wordpress.org/extend/plugins/user-switching/" rel="ugc">User Switching</a> plugin on the main site only to switch to a different user.

WPMS Sidebar Login Widget

Adds a sidebar widget to the main site of a WPMU/WPMS install.

Advanced Export for WP & WPMU vs WPMS Sidebar Login Widget