Of the three consorts of Lord Vishnu, not much is known about NeeLaa devi, who was born as Nappinnai. Interestingly whatever available information is there - apart from the 8 lined NeeLa sooktham of Vedas, is found in Tamil texts only. An analytical article on different facets of NeeLa Devi has been written by me and published in tamilhindu.com.
The link is
To read the article on Nappinnai, click the following link:-