Back in the day, I had a wonderful little utility that made using the CLI (or Shell) much easier. It let you redo previous lines, cut & paste text, and edit the line currently being typed, so you could quickly add a missing character by moving the cursor using the mouse instead of retyping the whole command.
Only problem is that I can't remember what this was called. Do these features ring a bell with anyone?
WShell, maybe? That was a pretty popular Shell enhancement/replacement here in the States, I think.
Fun fact: was written by William S. Hawes, creator of ARexx!