bmsterling

Give you the ability to upload files that you have in your Media Library. ?It also let you insert more then one file into a post at a time.
Please submit any bugs or suggested improvements to <a href="https://github.com/bmsterling/Attachment-Extender/issues" rel="nofollow ugc">https://github.com/bmsterling/Attachment-Extender/issues</a>
Need this plugin customized or need a plugin created, contact me via my contact form at <a href="http://kenzomedia.com" rel="nofollow ugc">http://kenzomedia.com</a>
Also available through twitter, @bmsterling
<h3>Credits</h3>
Copyright 2011 Benjamin Sterling
This program is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License, version 2, as 
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Attachment Extender

Give you the ability to upload files that you have in your Media Library.  It also let you insert more then one file into a post at a time.

Sybre Waaijer

Pro Mime Types adds a nifty (network) admin interface for allowing or blocking many file extensions for uploading media, documents, and other attachments.
It also shows you a list of all allowed MIME types on the site or network.
<ul>
<li>When a MIME type is allowed, users who can upload files can now do so for that MIME type.</li>
<li>When a MIME type is blocked, users see an error that the file isn’t allowed for security reasons.</li>
</ul>
For WordPress Multisite networks, you can enable this plugin in network mode to control MIME types for the entire network.
<h3>Features</h3>
<ul>
<li>You can control many MIME types and extensions for upload via a modern interface.</li>
<li>Pro Mime Types comes preconfigured by enabling many safe MIME types.</li>
<li>View all allowed MIME types for the site (also those enabled by other plugins).</li>
<li>Every MIME type comes with a security summary explaining why you should or shouldn’t allow it. To view the summary, hover the mouse cursor over the big colored icon.</li>
<li>Accessibility is at the forefront. For example, you can use full keyboard navigation, even for tooltips.</li>
<li>Adds text, code, and miscellaneous file types to the Media Library for sorting.</li>
<li>The Media Library gains support for more file types for sorting images, audio, video, documents, spreadsheets, and archives.</li>
</ul>
<h3>Multisite support</h3>
This plugin can run in network mode, where all sites are allowed one set of MIME types. You can configure the allowed MIME types via the network administration UI.
Alternatively, Pro Mime Types can run in single-site mode, where every subsite has custom-allowed MIME types. Only the network administrator can assign these on a per-site basis.

Pro Mime Types – Manage file media types

Pro Mime Types adds a nifty admin interface for allowing or blocking many file extensions for uploading media, documents, and other attachments.

Attachment Extender vs Pro Mime Types – Manage file media types