bigsmoke

This plugin was born out of a very simple need. Back in the day, when the wpautop filter was really sucky, I got annoyed and turned it off for my <a href="http://blog.bigsmoke.us/" rel="nofollow ugc">blog</a>. However, years later, me (but mostly my co-author, Halfgaar) got equally annoyed by having to manually type in all the angle brackets. I wanted to turn on the filter again, but I didn’t want this to affect all my old posts. Hence this plugin. See <a href="http://blog.bigsmoke.us/2010/12/09/wpautop" rel="nofollow ugc">this blog post</a> for more history.

wpautop control

Adds a global setting to turn the wpautop filter on and off. It also allows you to override this default for any post by adding a wpautop custom field …

binary-organic

With this plugin installed, you can say goodby to automatic and unwanted paragraph tags, your markup can stay beautiful, and never again will you have to wonder why there are line breaks where none should be.
Github: https://github.com/binaryorganic/Disable-Automatic-P-Tags

Disable Automatic P Tags

Disables the Wordpress "feature" that injects paragraph tags into double line breaks.

wpautop control vs Disable Automatic P Tags