Kazuma YAGYU

This plugin changes the WordPress’s native formatting rules to keep the numbers of the line breaks you wrote. 
It adds tags as many as line breaks in posts, comments, or both, even if the line was vacant. 
You can change the settings below in the admin panel. For example: you can choose to add tags for wrapping the paragraphs or not.
<h4>Settings</h4>
You can choose settings below.
<ol>
<li>Choose the target area: in posts, comments, or both(default).</li>
<li>Choose the breaking tag format: (default) or .</li>
<li>Choose the tag which the paragraphs will be wrapped with: tag(default) or none.</li>
<li>Shortcodes that you want to exclude from tag wrapping. 
This doesn’t work if you choose “none” in option #3. 
Default is only “caption” but you can set multiple shortcodes separating “|”. Ex. “caption|map”</li>
</ol>
<h4>Attention</h4>
This plugin doesn’t work with the Visual Editor, so far.
<h4>For Japanese users</h4>
このプラグインは行末に を追加します。 
記事投稿時の改行の数だけ が追加されます。 
段落にタグを追加するか、といったいくつかの設定ができます。 
※ビジュアルリッチエディターではうまく動作しません

Vacant Line BReaker

Wordpress ignores multiple line breaks normaly. This plugin breaks lines as may as you want.

marapper

Allow comments to chosen posts even if option “close comments to old posts” is on.
Разрешает комментирование отдельны? записей при включенной опции закрытии комментариев после определенного срока (ВП 2.7). Для этого надо включить чекбокс “Allow comments to this post”.
Работает как с плагином для версий ниже 2.6, так и с функцией по умолчанию в 2.7.

Allow Comments to Old Posts

Allow comments to posts with custom field "allow_comments" even if option 'close comments to old posts' is on.

Vacant Line BReaker vs Allow Comments to Old Posts