muzuiget

If you can not directly access image links or the loading is slowly, this script will rewrite the image 
links to googleusercontent.com proxy address. With Google server you can display image normally and load 
faster.

Google Image Proxy

Rewrite the image address to googleusercontent.com proxy address.

sleepm

Manage WordPress proxy in one page, you can set some domains that can be accessed through proxy. 
Also, http basic auth support.

WP Proxy

Manage WordPress proxy in one page, you can set some domains that can be accessed through proxy. Also, http basic auth support.

Google Image Proxy vs WP Proxy