Thomas Schulte

The plugin affects the image while it is uploaded. Straight 
after it is uploaded, all Exif data will be removed from the image. 
There is no original image left, nor made a backup. 
This plugin uses the removal service of http://www.exif-remove.de .
ATTENTION: This service is intended to save your privacy and 
should not be used for illegal activity like copyright violations. 
You are allowed to use this service for legal activity only, 
this includes that you must have the explicit permission 
from the holder of rights to clean a file with this plugin! 
As of now, to prevent abuse, the eventually existing 
copyright information will be kept inside the cleaned image. 
To disable this plugin temporarily, just deactivate it within the 
Exif-Remove settings menu. Thanks.

Exif-Remove

This plugin removes Exif data from uploaded images automatically.

LBell

This tool will attempt to irreversably change the actual post dates of all entries in the post type you choose (supports posts, pages, and custom post types).
The dates will be changed using (in order of priority):
<ol>
<li>‘exifize_date’ custom meta (date or ‘skip’)**</li>
<li>EXIF date of Featured Image</li>
<li>EXIF date of the first attached image</li>
<li>Do nothing. Be nothing.</li>
</ol>
**You can override the function with a custom meta field named: ‘exifize_date’ which accepts dates: ‘YYYY-MM-DD hh:mm:ss’ (for example: ‘2012-06-23 14:07:00’) or ‘skip’ to prevent the EXIFizer from making any changes.

EXIFize My Dates

It does as advertised. The only thing missing is an option do exify a single post. Whenever I post an older image, I have to check ALL the posts, so that's definitly a point of improvement. That says, what it does it does great!

Great tool to sort posts

Photoblog plugin to bulk change the published dates of a selected post type to the EXIF:capture_date of the Featured or 1st attached image of the post …

Exif-Remove vs EXIFize My Dates