Stefan Matei

Applies a lightbox to all image links if and only if the screen is big enough to fit a lightbox. 
Because lightboxes on iPhones should be illegal.

Conditional Lightbox

Use a lightbox only if the screen is big enough.

cubecolour

When you login to your WordPress site on your iPad, iPhone or iPod Touch, each character of your password will be displayed as you enter it.
This is not ideal when you login to a WordPress site from your iPad as part of a presentation or screencast, or when you login in a public place and someone might be looking over your shoulder.
This plugin obscures the password as you type it on your iPad; It causes each character of the password to appear as a plain disc.
Note: 
The iPad’s soft keys highlight to indicate a keystroke. If you are presenting on an external screen or projector, in addition to masking the password with this plugin, it is recommended to use a bluetooth keyboard paired to your iPad so that the soft keyboard does not appear on the screen.

iPad Rubberneck Disrupter

Hides the WordPress login password as it is typed on your iPad or other IOS device.

Conditional Lightbox vs iPad Rubberneck Disrupter