With Macne Nana's 7th birthday comes the announcement of a VOCALOID 4 update for Macne Nana, dubbed "Macne Nana Plus." Among other updates, the V4 release will include a library for Macne Nana Petit. The update is expected to be released in the second half of 2016.
http://macne.net/nanaplus.php
http://macne.net/nanaplus.php