(Ex-)RISC OS users might be familiar with QEdit. Newsq is a similar program for users of slrnpull, leafnode, sn, s-news or an NNTP server and transport combination such as INN with newsstar or suck.
It gives you a convenient interface to select and re-edit news messages after you've composed them and have second thoughts while they're still sitting in the outgoing queue.
Support for sn is currently just a quick adaptation of the leafnode back-end:- it won't work if you have more than one server for outgoing articles.
It's written on a Linux system, but hopefully should work on most modern flavours of Unix.
Read the NEWS file online.