Simple Login Registration plugin with only login, registration, password recovery and related features. If you don’t need heavy stuffs like membership, profile etc, then it is ideal for you to keep your site smooth.

Gateman – Simple Login Registration

A lightweight login and registration plugin designed without unnecessary bloat. Just the essential features you need for a smooth user experience.

girts_u

Allows to register, log in and post comments to a WordPress based website by using “Draugiem pase” authentication provided by draugiem.lv social network. 
To use this plugin, you have to get your App ID and API key by registering your application on draugiem.lv – <a href="http://www.draugiem.lv/development/?view=my_dev_apps" rel="nofollow ugc">development section</a>. 
Plugin replaces user avatars with their draugiem.lv profile pics (may not work with older themes) and shows a link to draugiem.lv profile next to the comments.

Draugiem.lv Pase

Provides authentication for WordPress with "Draugiem pase" authentication method provided by draugiem.lv social network.

Gateman – Simple Login Registration vs Draugiem.lv Pase