Usually when you select words in any text editor, you can select complete lines (ie rows). This makes is a little difficult when the data is arranged in columns rather than rows, so that when you are trying to select data you need it to select some certain columns.
Strange that it may seem, such a functionality is already available in a lot of text editors. If you need to select data vertically, just hold down the ALT key when selecting. I think that this functionality is available in a lot of editors. Do let me know if you find any new ones.
I know about MS Office and Notepad+.