Best free WP plugins to send posts as a Email newsletter.

MailPoet Newsletters (formerly Wysija)
Automatically Send post notifications as newsletters from WordPress. It provide Drag & drop visual editor, subscription form for blog sidebar.

Email newsletter
It send emails for particular person who commended, registered, subscribed your blog.

It provide useful features such as unlimited subscribers and newsletters, subscription widget and subscriber’s preferences.

SendPress: Email Marketing and Newsletters
Free plugin to create, send and track newsletters fro your WordPress site.

Send post notification via newsletter based on post, daily, weekly and monthly.

WP Autoresponder And Newsletter Plugin
It provide option to import subscribers from Feedburner and Aweber.

ALO EasyMail Newsletter
It provide multilanguage support, newsletter themes and sending report.

Newsletter Manager
Free plugin to create and send email newsletters.

Knews Multilingual Newsletters
Professional newsletter plugin which support multilanguage.

Sendit Newsletter

Send email notification when new post published.

MailUp newsletter sign-up form

Newsletter Sign-Up