Sajjad Hossain

This plugin allows you to restrict your site users from uploading files of certain types and control the maximum file upload size. Administrator can select the file types and file upload limit by user role. This plugin restricts users from uploading unwanted files using the WordPress media uploader.
It is very simple to use. You will be able give permissions role wise. To restore WordPress’s default selection, just deactivate the plugin.
Any issue? Please let me know (http://sajjadhossain.com/contact-me/).

WP Upload Restriction

This plugin allows you to control upload of files based on file types and sizes.

Simon Wheatley

This plugin adds a page in the admin area where you can see all the queued Cron events, when they are due, which schedule they are on (or if they are one off) and which hook they will call. Future development might include:
<ul>
<li>Removing Cron events</li>
<li>Seeing which functions/methods are currently called by which hooks</li>
<li>Manually adding Cron events</li>
<li>Editing Cron events</li>
</ul>
However, do not hold your breath! Development for this plugin will be as and when I need it, or when someone submits a handy patch. I’m definitely open to co-development on this one, so if you want to join in then <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a>.
Any issues: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a>.

Cron View

Allows you to view all WP Cron events. Handy for development.

WP Upload Restriction vs Cron View