ArcVieh

You can select images from media Library in the Widgets backend that will be shown on your Page. You can enter a size for the images.
The thumb-images will be linked to the full-sized-image. 
Requieres PHP 5!

Media Images Widget

Requieres PHP 5! You can select images from media Library in the Widgets backend that will be shown on your Page.

davide.airaghi

This plugin let you add file types to the default list of file extensions 
supported by the Media Library upload procedure.

WP Extra File Types


Works partially. With correct mime type, yes you can upload new files as "documents", but they are either refused in the end, or renamed into TIF extension if the mimtype is image.



impossible to insert them as attachement in a post.



there is a better plugin out there that creates posts for that purpose.


does not work, as expected

Plugin to let you extend the list of allowed file types supported by the Wordpress Media Library

Media Images Widget vs WP Extra File Types