Solanum nigrum - http://www.flowersofindia.net/catalog/slides/Black%20Nightsh... Was a common home cooked item in Tamil Nadu (South India) called Manathakali Keerai in Tamil
Vigna unguiculata - called Karamani in Tamil, is also a very common vegetable in home cuisine of Tamil Nadu https://www.youtube.com/watch?v=oifwbfSrKWA
Corchorus olitorius - http://www.flowersofindia.net/catalog/slides/Nalta%20Jute.ht... called Punakku, however is used only as traditional cattle feed and considered lowly for human consumption for unknown reasons and is a slang used to insult a person for foolishness or low IQ
Amaranthus - Mollai Keerai Moringa oleifera - Murungai, very popular and can be seen grown in most homes in rural/semi-urban Tamilnadu, and very popular in Sambhar - https://www.youtube.com/watch?v=iKT--cbBmhk