[bwr]

rlwrap to fix the awful command line interface of sqlplus.

[yangyang]

I used to to use yasql as a sqlplus replacement, it was pretty basic but much better.

[ams6110]

sql-oracle mode in emacs takes away a lot of the pain of using sql-plus (if you're an emacs-er)

[makmanalp]

gqlplus is pretty good too.

[j_baker]

I use sqlpython.