NS Name Split takes the core Joomla registration 'Name' field and converts it to 'First Name' and 'Last Name'.
When a user registers on your site it will take the first and last name entries, merge the name together (i.e. first last) and insert it into the core name field/table.
This method avoids core hacks so your site can be updated when new Joomla versions are released. Keeping the core name field intact ensures that other extensions can still use the name field to function normally.
v3.1 - 06 Oct 2014
Fixed J2.5 bug that was inserting duplicate names for existing users.
v3.0 - 11 Sep 2014
Refactored name handling function. Fixed save issue and existing user issue.
v2.4 - 08 Sep 2014
Added First/Last fields to user profile edit view.
v2.3 08 Aug 2014
Added language files and Joomla Update function.
v2.2 - 24 Aug 2013
Added Joomla 3.x compatibility
Cleaned up UI
v1.2 - 25 Jul 2013
Initial release for Joomla 2.5