Gargron

Sometimes you need to use max-width settings in css to fit the layout. But what to do if the image stretchs or folds? The problem are the width and height attributes in image tags inserted by WordPress. This plugin deletes these attributes.
This plugin deletes the attribute “height” from the image tag. So it’s very simple.

NoSizeTags

Tired from folded or stretched images you wanted to fit into your theme with max-width css tag? This plugin solves the problem.

John P. Bloch

Create child themes from any non-child theme with the click of a button.
This plugin is multisite compatible; if used on a multisite network, controls for creating child themes will be in the network admin instead of the regular site admin. Pick the parent theme from the dropdown and name name your new child theme. You can also change the author name and select files you want to copy from the parent to the new theme.
Click the button and you’re all set!

Child Themify

Create child themes with the click of a button.

NoSizeTags vs Child Themify