http://julialang.org/ I guess I should give a nod to Python as well, and PANDAS by Wes McKinney which provides dataframe-like structures and methods on these. http://pandas.pydata.org/ In diplomatic terms, there
pandas.reset_index in Python is used to reset the current index of a dataframe to default indexing (0 to number of rows minus 1) or to reset multi level index. By doing so the original index gets converted to a column.