The description of this plugin includes leftmost and/or rightmost columns -- which I think used to be true. You might want to update description for clarity:
Fix the header, footer, left or right columns of a table in place, to always show them when scrolling http://www.datatables.net/
The description of this plugin includes leftmost and/or rightmost columns -- which I think used to be true. You might want to update description for clarity:
https://github.com/DataTables/FixedHeader/blob/41a3c3ed59e3fa00f1588c5544349b7a5f7e8daf/Readme.md