I am looking for something like Sublime Text for tables. That is, when it encounters something with table delimited values (for example), the columns should be displayed aligned.
Excel, Calligra Sheets or LibreOffice Calc are too heavy for me, I want simpler, lighter, faster and free alternatives.
Update: The suggestions so far include spreadsheet programs that are able to do plotting and calculations. This is fine, but is also kind of overkill for me. I just need to edit the table, and aligned display. In fact, if Sublime Text (or any text editor, like Gedit, Geany) had a plugin that displayed columns aligned, that would be enough (perfect) for me.