It is probably a good idea to download from this link http://www.decodephp.com 
as the wordpress plugins download sections seems to miss the tempfiles directory or the file in it for some reason , 
this directory is very important for the plugin to work.
This plugin will help you quickly switch between wordpress admins by letting you select from a list of blogs you have entered in the 
WP Admin Switcher administration section. Assuming you are on the posts management page , and you select a different blog from the drop down you will be immediately switched to that blogs posts management page. The plugin attempts to keep all functionality intact. When you are on the other blogs page , you continue to see the drop down , you can select “Parent Site” from the list to jump back to the parent blog.
The plugin will also work with free blogs hosted at wordpress.com.

WP Admin Switcher

It is probably a good idea to download from this link http://www.decodephp.com

gfazioli

WP CleanFix is a plugin born to improve the core features within your WordPress installation and keep clean your databases with ease 
This plugin is the perfect fit for anybody who needs to get rid of the annoyances database management which regularly rises and for those who need to literally clean their WordPress up from missing categories, users, meta, etc.
CleanFix embodies several functions, which normally are provided as single plugins, and make them all quickly and easily available through a clean dashboard for the website management (for specific information see the features tab). 
A clean and simple UI lets you enable/disable every single feature quickly and smoothly with just a click. Since CleanFix takes advantage of Ajax, you’ll be able to perform simultaneously multiple actions without refreshing your page. 
CleanFix, you’ve never been happier to clean stuff.
<h4>Features</h4>
<ul>
<li>Optimise database tables, MyISAM and InnoDB</li>
<li>Reset auto-increment preferences</li>
<li>Check/Remove expired transient</li>
<li>Transient preferences</li>
<li>Check/Remove Post Revision, post in trash, auto-draft</li>
<li>Check/Remove Post Meta, Orphan Media attachments, Orphans Post Tags and Orphans Post Categories</li>
<li>Check/Repair Post without valid user linked</li>
<li>Check/Remove Orphans Post Types</li>
<li>Check/Repair Terms, Terms Taxonomies and Terms Relationships</li>
<li>Check/Remove Orphans generic Terms</li>
<li>Check/Remove expired user transient</li>
<li>Check/Remove user meta</li>
<li>Check/Remove Unapproved, SPAM and Trash Comments</li>
<li>Tools/Database compact index</li>
<li>Tools/Posts Find & Replace</li>
<li>Tools/Comments Find & Replace</li>
<li>Tools/Post Meta Find & Replace</li>
</ul>

WP CleanFix

Release 5.1.1

Oooppsss!!! 500 Error

The all in one tool for check, repair, fix and optimize your WordPress blog.

WP Admin Switcher vs WP CleanFix