Nolan Chou

Sometimes we forgot change our file to a available name. So the plugin can help you auto change your upload file. 
I will add a filetype option of setting in next version. 
And a rename popup before the file upload if you change setting in future, default value is post_name.

wp_upload_rename

Change upload filename to random characters / random numbers / date / other by yourself.

Grégory Viguier

PoseLab

Select the crop position of your thumbnails. WordPress crops thumbnails of images through the center, which does not always give us the desired results. This plugin allows you to select the crop position of images from WordPress uploader.

Thumbnail Crop Position

Select the crop position of your thumbnails.

wp_upload_rename vs Thumbnail Crop Position