CafeTran

New "Columns" Editing Commands - Easily cut, copy, delete, or rearrange columns in delimited (CSV, TSV) text files without requiring a spreadsheet or complicated regular expressions. // Very interesting to move columns in source and glossary files around. Didn’t test it yet.

http://www.barebones.com/products/bbedit/bbedit12.html

Perhaps it allows replacing in selected columns only. Which would be nice. Of course, can do this too. But sometimes, an external editor is handier.

EmEditor on Windows also has column editing, which is very cool. Although I think I still prefer editing certain delimited formats in Ron’s CSV Editor.