Slava Abakumov

An “Add To Group” button will appear near Add Friend in a list of members. This button will open a popup where a site admin can select a group he wants this user become a member of.
All actions are ajaxified.

BP Admin Actions

Let admin do some more stuff with users - adding them to any group manually from members list

Holger Wassenhoven

This plugin adds row actions to WordPress list tables. In this version it adds the edit and the view link for opening in new tab. Currently this is only added to the post and the page list table. There will be additional links inside the table rows. Next to the edit link there will be an edit (New tab) link. Next to the view link there will be a view (new tab) link.
This plugin is really small and it´s functions are executed only, if you are on the WordPress post or page edit page. So it doesn´t even reduce the performance of your site.

New Tab Actions by wasiwarez

Adds row actions to WordPress post and page list tables for executing in new tab

BP Admin Actions vs New Tab Actions by wasiwarez